/diy/ - Do It Yourself

>>1178182
lets see it in action

>>1178182
would you carry my big payload?

>>1178182
looks heavy
can it even fly?

>>1178182
How do I do big loads?

>>1178274
open your mouth wider

>>1178182
More like big gay loads lol

Damn. What are you hauling?

>>1178182
i bought this all together pre-assembled off someone and it has a DJI wookong M Flight controller. why do those cost so much money? what's so special about them?

>>1178350
package delivery service

>>1178347
l o l

>>1178543
>package delivery service
If you can figure a way to deliver me fast food for less than a dollar, I would use your service.

>>1178691

how fat do you have to be to need a drone delivery service for your fast food?

>>1178693
I don't have a car. So it's stupid (read: expensive) for me to go out to get fast food.

>>1178713
This and nearest fast food is over 30 miles from me. I do have a car tho.

I want this to be a thing. One giant problem is weight. No one would use it if the food was cold, you could use a gas powered one and pump the exhaust directly in the food container to keep it warm and save on cooking time.

>>1178182
Nice, gonna drop improvised bombs like ISIS does?

>>1178764
They use smaller ones.

>>1178777
Are they using a frigging shuttlecock for the tailfin????

>>1178777
future wars will have swarms of drones

>>1178743
Insulated freezer bag would work 90% of the time. Exhaust dries shit out. But heat pipes from it is spot on.

>>1178786
And miss out on all that tasty carbon??

>>1178783
Yes.

>>1178784
You are correct. It is nearly there now.

>>1178929
holy shit, that's incredible

>>1178945
The French are countering it.

>>1178182

Use mylar pouches and possibly a resistive heating element, and you'll be able to deliver piping hot tacos despite flying them through cold ass air.

That thing can lift you, unless you're a fatty.

https://www.youtube.com/watch?v=JFwibWXyvfI

>>1178958
that phantom got btfo

>>1178990
why not asbestos pouches? it's a better insulator and lighter.

>>1179029
If you do this, make sure to wrap your food tightly in clingwrap. Asbestos is not a good spice.

>>1179456
B-but I cooked this food asbestos I could...

>>1178182
OP wants to break el chapo out of prison.

>>1179533
don't you mean el chapeau?

>>1179455
Fair enough.

But I guess I'll pick a more fancy one up if I see one at a good sale.

I currently have a traxxas rustler, and an x-maxx on the way. Both use pretty much the same kind of 15usd transmitter.

>>1178958
Well, looks like servo actuated switchblades are in order. Fuckoff birb

>>1179007
>Korean

Only small Asians and children could use it for very long. The flight time due to battery weight is the main problem. Normal helicopters are far more usable until battery tech can have a major tech leap.

>>1179718
i'm glad petrol is as energy dense as it is. batteries are such POS when you think about it.

>>1179718
What's the best source for a kit? I'll be done restomodding my Comanche in a month or two and I need something to tow with it.

anyone going acrobatic?
https://www.youtube.com/watch?v=TnGhEInTXYc

>>1179725
For a "Mosquito"? Straight from the company itself.

>>1179758
Pretty nice.

>>1179766
For any model. I looked at mosquito kit pricing and it looks like a complete kit is like $20,000.

>>1179806
I'd probably get the Mosquito XEL, if I were to get one.

>>1179718
Well, there's no reason you couldn't make it diesel-electric. Replace the battery with a tiny diesel generator, like the ones they put in hybrid cars. You could swap out ten kilos of battery for five kilos of generator and a five litre fuel tank, and probably get the same range. It scales a lot better if you're willing to use more payload for fuel tank.

>>1179827
Yes that's all well and good but does anybody know of any $1-2K kits? I'm not paying more than what both of my vehicles are worth for one.

>>1179706
Or just make the blades out of metal.

>>1179706
>>1179906
Just the plastic props are enough to hurt the birds. They had to put a halt to training the birds for two months because their feet were getting lacerated.

>>1179896
>$1-2K kits
>FAA approved helicopter

kek

>>1179915
I wondered about that and if they were using some sort of glove to protect their feet or not.

>>1179919
>FAA approved
What is an ultralight

>>1179921
At first they were going to use a glove, but birds don't like them, and the skin on their legs is strong to begin with, to protect them when they hunt and fail to kill their prey when they grab it. They assumed the birds would be fine with just a plastic propeller, since squirrel teeth or such would generally cause a greater wound, but there was a whole animal welfare issue when it came to light that the birds were getting hurt from the props.

>>1179919
ayy lmao

>>1179922
>>1179919
FAA currently doesn't approve anything that can't land under it's own power. No fixed pitched quad will ever meet that criteria

>>1179929
all ISIS would need to do is switch propellers to carbon fibre blades and the damage would be so severe to the eagle's feet that they wouldn't want to do it again.

>>1179981
I'm not talking about quads, I'm talking about kit helicopters.

>>1179922ones in
Something that isn't FAA approved. The Mosquito requires a pilot's license. The Mosquito XEL doesn't, but is the same helicopter with additional safety gear, allowing it to go through a legal loophole.

>>1179929
>but there was a whole animal welfare issue when it came to light that the birds were getting hurt from the props.

Muslims with PETA memberships perhaps? They do realize the birds may likely get blown up right?

>>1179986
>I'm not talking about quads, I'm talking about kit helicopters.

Kit helicopters can land under their own power (auto-rotation).

>>1179991
So fucking what? I'm asking what the best ultralight kit helicopter is.

>>1179992
>what the best ultralight kit helicopter is.

Mosquito

>>1179995
Not an ultralight, requires pilot's license.

i just went out and tested my first successful quad and the main problem i had was that the throttle is too sensitive. it's difficult to prevent it from flying higher into the sky or flying lower into the ground.

>>1179992
>So fucking what? I'm asking what the best ultralight kit helicopter is.
>being this retarded

stop posting.

After I move forward at full speed with my quad copter and then take my fingers off the sticks there is a forward drift induced that I can't get rid of until I reset the quad copter. Why would this be?

>>1178777
So the rumors are true! They due use the feather of the chickens the just fucked.

>>1180040
Dam savages....

>>1178777
why do they use phantom 4's? why not 3s

on this note is it possible to make my custom quadcopter control more like a phantom 4 in that when you move the throttle down all the way it gradually descends to earth rather than completely cutting the motors off?

>>1180015
A throttle curve can help with that, you get more fine control in the middle in exchange for higher sensitivity towards either end. Throttle control is something you'll learn pretty quickly with practice though.

>>1179981
You don't need faa approval when making an ultralight.

Flying Under Ultralight Rules (FAR Part 103)

Recreational flight limited to single seaters weighing less than 254 lbs
Any category, class or type of vehicle permitted (i.e. airplane, trike, powered parachute)
FAA has chosen not to promulgate Federal regulations regarding pilot certification, vehiclecertification, and vehicle registration, preferring that the ultralight community assume the initiative forthe development of these important safety programs. The ultralight community has taken positiveaction and developed programs almost two decades ago gaining FAA approval for their implementation.
FAA further states, "...it should be emphasized that the individual ultralight operator's support andcompliance with national self-regulation programs is essential to the FAA's continued policy ofallowing industry self-regulation in these areas."

Vehicle Requirements

FAA does not require ultralights to have any proof of airworthiness. It is the responsibility of the owner to make sure the ultralight is safe to fly. Publications such as the "Federal Ultralight Resource Guide" and the "Amateur Built Aircraft and Ultralight Flight Testing Handbook", available in the USUA Flying Store, provide explanations of how FAA defines an ultralight. These publications cover all phases of preparation and of flight testing for newly constructed non-production aircraft.

Ultralight vehicle registration is available through USUA. Download a registration application from the Forms section.

Pilot/Instructor Requirements

FAA does not certify ultralight-specific pilot knowledge and proficiency, but it expects pilots to complete training under an FAA-recognized program.

>>1179987
They didn't do this because of ISIS, it was to keep quads away from airports, and in preparation of a law that would have made it illegal to fly a quad with a camera in populated areas.

Aren't helis innately more efficient then multirotors?

>>1180115
what, so just because someone gets a pussy shot of someone through a window, the police have the right to btfo their drone with an eagle? well they better not get a fine on top of that.

>>1180139
>well they better not get a fine on top of that.
Why not, if they're doing illegal shit knowingly?

>>1180142
phantom 4 already cost 2k. that's enough

>>1180144
Then you're using pointlessly expensive stuff for your illegal activity. Use a cheaper voyeur camera instead.

>>1180145
This, private property is less valuable here in Europe than privacy and public security. If you're doing something illegal you're asking for it, if you're idiot enough to drive a drone in an airport 2k € of loss are the last problem

>>1180125
Yes.
http://www.fai.org/fai-record-file/?recordId=17302
https://web.archive.org/web/20150214073300/http://www.twheli.de:80/modelle/weltrekord-logo-600-se
>178 minutes
>https://www.rcgroups.com/forums/showthread.php?1880665-129min-15s-flighttime-with-quad
>129 minutes
The main driver for power consumption with a hovering rotorcraft is disc loading. The ratio of weight/lift to rotor disc area. Obviously, a large, continuous single rotor on a helicopter will have greater total area than several smaller rotors with gaps in-between them, so helicopters have an inherent advantage there. They also have the lift acting at a single point, meaning there's less necessary structural dead weight required to hold up the battery securely (vs. a wide multirotor frame which must transfer the load from the tips of multiple arms to a single battery point-load in the middle).

That said, multirotors do have their own smaller advantages for endurance, and there are modifications that can be done to a multirotor (more easily than with a helicopter) to improve endurance further. Whereas helicopter blades are almost always straight and devoid of twist, multirotor props are often tapered (which is favorable for endurance) and usually twisted (albeit usually more than is desirable for hovering). Furthermore, they are easier to reconfigure or modify with longer arms, bigger props and slower-turning motors. I wouldn't be surprised if multirotors catch up to helicopters in the near future, if only due to a lack of interest and progress with helicopters.

>>1180115
>in preparation of a law that would have made it illegal to fly a quad with a camera in populated areas.
Might as well ban camera phones too.

>>1179998
Mosquito XEL doesn't because of the added safety feature.

>>1179767
whoa that's crazy. it's like a dragon fly

>>1180292
>314 lb empty
>80 mph max speed
Even if the floats and other "safety devices" comprise over 60 of those 314 pounds, it's still not Part 103 compliant since it's capable of more than 55 knots in level flight.

Sup /rcg/.

Can someone give me a TL;DR on 2.4GHz quad controllers? Last time I flew something it was on 27MHz with a box of crystals to go with, meanwhile I have scored a Q212 that crashed in my yard a month ago. I out a few signs up, no legitimate responses, so I may as well have a fiddle.

I understand 2.4GHz systems run on either PCM or PPM, but I'm hazy on if/how the controller pairs to the flight controller. I have a shitty controller for some cheap junk quad I got at a trade show a while ago but there doesn't seem to be a way to connect it. The manual for the Q212 suggests you move the throttle stick up and down till the controller stops beeping, indicating a successful connection. While my controller does beep until paired, it does not seem to work with the Q212, perhaps because the original controller is pre-programmed or otherwise "keyed" to the Q212 (or this cheapshit controller is keyed to the cheapo quad it came with).

Does one typically need to "pair" a controller to a quad somehow?

>>1180269
> Aerial reconnaissance can be done from the ground.
> A full photo survey of a 20 acre property can be done from its perimeter.

Stop being so retarded.

>>1180679
>Does one typically need to "pair" a controller to a quad somehow

no. at least not for modern flight controllers and receivers. you just need to specify the protocol being used from within the software interface.

also, to avoid confusion you should refer to the thing that connects to a flight controller as a receiver, not a controller.

Finally videos of the DBXL-E appearing.

That thing is so heavy compared to the X-maxx.

It's definitely more of an offroad racer than a basher.

Can't wait to see someone pump it up to 12-16S.

>>1180679
the thing in my pic is called a transmitter. it wirelessly connects to a receiver and that receiver has a physical wired connection to the flight controller. within the flight controller's software you just need to specify what protocol it communicates with the receiver via. a transmitter does need to be paired to a receiver but if you purchased them together, chances are they are already paired.

>>1180688
> also, to avoid confusion
Yeah, it felt wrong saying it as well, I'm just used to receivers being discreet components, not part of a larger board/control system. Noted.

Pic related is the controller, its about as sophisticated as a claw hammer best as I can tell. No I/O ports, and yes, that's a sticker, not an LCD screen. I might trot the lot up to the local RC barn and test it on a controller there before I commit to the purchase.

>>1180692
Well shit, just looked up the receiver (LG88009LIM), it's a 5.8GHz unit. No wonder shits not working. Thanks anyway folks.

>>1180687
>20 acre property
>populated area
But sure, I'M the retarded one.

>>1180679
>I understand 2.4GHz systems run on either PCM or PPM
On the radio side, they're virtually all now what you would've referred to as PCM back then. Everything gets digitized into bits and bytes and fed to a digital 2.4 GHz ISM radio module to be broadcast to an often-identical module in the receiver. PPM encoding is still used elsewhere for communicating over wires (i.e. through the trainer cord, or sometimes between microprocessors onboard the aircraft), but not over the airwaves like it was back in the FM days.
>but I'm hazy on if/how the controller pairs to the flight controller.
The procedure varies (widely) from controller to controller.
>I have a shitty controller for some cheap junk quad I got at a trade show a while ago but there doesn't seem to be a way to connect it.
There probably isn't. 2.4 controllers are far from standardized, and there's a whole gamut of different protocols, and it's rare for a given transmitter or receiver to be compatible with more than one or two of these protocols. The Q212 uses the "v202" protocol, and if you can find out the model or at least the brand of the controller you have then you might want to take a look at this list (https://www.deviationtx.com/wiki/supported_models)) to see if it supports the v202 protocol or not, but it's already sounding like it doesn't.
Alternatively, you could do this: https://www.rcgroups.com/forums/showthread.php?2191717-DIY-v2x2-TX-module-Ultra-Cheap-Ultra-Easy
Or buy a Walkera Devo transmitter, install Deviation on it and hack it into a universal multi-module transmitter (Deviation's really cool that way).

what is the biggest electric motor you can buy for a hobby multi rotor (within reason)?

>>1180711
This is what the FT guys used for their giant race-quad. There's probably bigger stuff out there though.
http://www.rctigermotor.com/index.php?m=content&c=index&a=show&catid=198&id=339

>>1180670
It was literally one of their advertising points a couple years ago. Did the FAA change some rules or did the company change the model?

>>1180950
Why would you buy that for 35 if you can get a mozzy for 20?

>>1180711
>within reason
1) How deep are your pockets?
2) How big are your balls?

>>1178182
I'll show you a big load

>>1180950
Rules are the same as they've been for ages. And this isn't the first case I've seen; plenty other manufacturers sell "Ultralights" that are technically overweight or too fast as well.

The thing is nobody seems to really give a fuck about compliance. Enforcement is fairly minimal, and usually only occurs in relation to an incident or other violation. The FAA can't exactly pull a UL pilot's license, given that UL pilots are rarely licensed to begin with, and they don't confiscate non-compliant ULs since it's technically only illegal to operate one, not simply to own it. So the penalty, on the occasion that it is applied (which is rare), is typically just a modest fine.

Similarly, UL manufacturers aren't regulated by the FAA, and while the FTC could technically come after them for false advertising, that can usually only happen when there are discontented consumers who have been wronged. And let's face it, no UL owner is gonna go to the government and complain how the aircraft they bought has too much performance.

So yeah. As long as the machines are still reasonably safe, I doubt this practice will stop any time soon.

>>1181141
wouldnt that motor kill a nigger like me?

while flying my quad i gradually need to increase my elevator trim during the flight to maintain a single position and not have it drift. Why does it worsen over time?

>>1181187

>>1181187
I'm not sure the specific problem but that reminds me of something heating up and the hotter it gets the more it gets out of spec.

>>1181222
it starts off with me needing 0 elevator trim and then after five minutes i have a whopping 30 clicks in one direction. can you believe that?

>>1180267
>I wouldn't be surprised if multirotors catch up to helicopters in the near future, if only due to a lack of interest and progress with helicopters.
What about tip speed of props? The larger the prop the less rpm you can run before it breaks the sound barrier. Conventional helicopters aren't as flexible when it comes to possible RPM due to mechanical linkages and gearing. While direct drive electric motors run up to 100kRPM.

What's an estimate cost of a multirotor platform to carry a payload of like 5kilos?

I want one purely for lifting my camera setup to higher places. No racing or anything similar.

>>1181280
Around $1000 for the frame, motors, etc.
If you want a gimbal, add on another $500-$1000

>>1181352
Not too shabby.

Thanks!

Is it a bad idea to use a "small" servo made for 1/10 scale rc cars, for a much larger rc car? Even though the strength is well above the stock servo in the larger car?

What's the difference between the different scaled servos?

>>1178182
>when I see OP image
>I think of this.

>>1181187
i've fixed it now by increase the gyro update frequency to 4khz. and with that today marks the first day i've flown a custom quad where the handling hasn't been all fucked up and I didn't crash it.

>>1178182
https://www.youtube.com/watch?v=DyUrqZBs2XA

>>1180710
Well, that's about all I needed to know to get underway, appreciate the concise answer man. I have since taken the thing to my local hobby house and confirmed it works, so I'm happy to drop some coin on it.

>>1180692 is the controller in question, I have since had it open and it does have an internal 5 pin programming header, feeding an STM8S003 uC. It also has a discreet transmitter daughterboard, which I could swap with a 5.8GHz unit I'd guess. But again, this thing is chintzy as fuck, and I wouldn't trust it with anything more than the 5 minute flyer it came with. Devo F7 + Deviation seems like a much more flexible and future proof option, thanks again for the protip mang.

>>1181585
>It also has a discreet transmitter daughterboard, which I could swap with a 5.8GHz unit I'd guess.
5.8 what? All the major protocols (with the exception of 433/915 MHz LRS protocols) run on 2.4 GHz modules. 5.8 is usually video/FPV.

The module you're looking for to bind with a Q212 is the NRF24L01 (https://www.deviationtx.com/wiki/modulelist/nrf24l01)), a DSSS 2.4 GHz GFSK module by Nordic Semiconductor. The Devo's stock module is actually different (CYRF6836, same as Spektrum), and it too will need to be modified, but the Devo's hardware is particularly well-suited to installing modules for other protocols - including multi-modules with support for almost every protocol out there (https://www.deviationtx.com/wiki/building_the_multi-module, https://www.banggood.com/CC2500-NRF24L01-A7105-Multi-RF-3-IN-1-Wireless-Module-for-DEVO-Transmitter-p-1046304.html?rmmds=search).). And I believe Deviation is still by far the firmware with the widest selection of protocols (though I believe people are working to expand compatible protocols for the popular Taranis w/ OpenTX too, albeit less elegantly).

>Devo F7 + Deviation
I think Deviation's support for the F series is somewhat more limited, not sure how much. Apparently development slowed down when Walkera started backing away from the Devo. I'd look around the Deviation website and do some research before you proceed. And if you really want futureproof, you might also want to consider an OpenTX-capable transmitter instead, even if the multiprotocol support and documentation aren't as good. Deviation seems to be slowing down in terms of support and development, while OpenTX seems to have lots of momentum and already has some features that Deviation lacks.

Just received my x-maxx(used).

I can't get rid of this boner I'm currently having.
Help.

>>1181784
It will take a while to get used to driving this car close to the camera.

If my rustler hits the tripod, no worries.. But the X-maxx..

>>1180267
>I wouldn't be surprised if multirotors catch up to helicopters in the near future
Never going to happen.
Multirotors don't have any benefits if you scale them up to human transport size.

>>1181552
Crikey

>>1181654
Thought 5.8 was also wifi frequency. Alot of off the shelf drones are flying routers.

>>1181261
>What about tip speed of props? The larger the prop the less rpm you can run before it breaks the sound barrier.
A non-issue for efficiency-oriented designs. Slower is generally more efficient (up to a point, anyways).
>Conventional helicopters aren't as flexible when it comes to possible RPM due to mechanical linkages and gearing.
Not sure what you mean by that. Gearing yields more flexibility, not less.
>>1181834
I meant for unmanned electrics. There's more push on the multirotor side than with helicopters, even though helicopters WOULD always have the advantage efficiency-wise if given the same level of focus.

Putting these 6400mAh 3S batteries into storage, at 1A, first time.

It's been going at it for 2hours soon.

Should it take this long?

>>1181845
It is... but wifi drones can usually be controlled with a smartphone so I dunno what you'd want the controller for in that case.

>>1178777
Thats actully a bit impressive.
What kind of damage to they do?

So I recently got a camera quad (Xiro Xplorer V). I like flying it so much that I decided to look into also getting into FPV drones.

The problem is that I'm seeing people telling me that if I'm getting into it, I should go all in. Get the Taranis Q X7, buy a racing drone, and a fatshark. The problem is that I'm not entirely sure that's where I want to go with it yet.
I really just wanted to get something like a Tinywhoop and some goggles that I could use to fly between trees and in the woods near my house or maybe even inside my house. Should I go all in or am I setting myself up for an expensive hobby that I might not even like?

is it possible to set your quadcopter up so that it always tries to turn and face north when you are just letting it sit at a hover?
I want to do this so that when the wind blows it away, I don't become disorientated about its direction and i can quickly recover it before it crashes into something.

>>1182158
Actually using colored propellers probably be cheaper/quicker, just have your preferred color as the front of the quadcopter, and black in the back.

>>1182168
not really considering the magnotometer thing doesn't require purchase of new things

>>1182171
Ah, my bad didn't realize you already had one. I just skimmed your post.

>>1182172
im assuming that most FC's already have them

>>1182158
Sounds like headless mode.

>>1182175
thanks i found that in cleanflight. ill go test it now

do you think ts351 is a good transmitter?

>>1178182
if I get one of those and make a glass bottom container for my chihuahua and take him for sight seeing rides, would he love it?

Can you charge a lipo battery over and over again after using it?

>charge battery
>go drive
>battery loses power
>charge it again
>resume driving
>rinse repeat

I haven't dealt with lipos much but I know there's danger in handling them wrong.

>>1182214
i thought this was how batteries worked in general

>>1182215
Well, yeah.

But since I'm new to lipos I've been researching and I can't seem to find the answer to my question.

I can imagine that it would be harmful to the battery to charge it 10times in a row in a day.

>>1182217
laptops have lipos. ive never heard of not being allowed to charge your laptop more than 10 times a day

>>1181864
>Not sure what you mean by that. Gearing yields more flexibility, not less.
You can just change electric motor topology to suit whatever RPM you like.

Is there any way to leverage very high RPM to generate thrust? Getting electric motors to spin at 100,000 RPM is easy. Is there any configuration where small diameter ducted fans can generate efficient thrust?

Existing prop designs are all built with combustion engine RPMs in mind. No one would design a prop suited to 100krpm in the past because IC engines would require complex gearing to output that.

thought on the new dji spark for basic Ariel photography?

t. noob

>>1182365
Looks pretty impressive for that price.

Wonder if you can diy to fit a larger battery. Runtime is quite small.

>>1178274
Fixed wing.

>>1182217
Batteries damage themselves by just existing. Something that isn't being used isn't worth having.

>>1180269
The reasoning for the law when they brought that up was "You expect privacy in an apartment twenty metres above ground, you don't have the same expectations at street level". Sure, passers-by are less likely to look in through my windows at the sixth floor, but if I wanted privacy I'd still pull the blinds or have reflective foil installed.

So I have been working on my quadcopter for about a year now. Everything is set up and looking great. In cleanflight the motors spin up and the naze 32 recives the correct commands from my DXE receiver, however when i disconnect it from my computer i cant get the motors to spin up with my reciver.

>>1182554
Do you have some sort of arming method set up? By default I believe it's set to holding the sticks in a specific position, though I recommend setting it to a switch so you're less likely to arm/disarm accidentally.

>>1182556
There is a switch on the DXE receiver with toggles the throttle, but i don't know if that is the same thing as arming it.

>>1182557
No, arming is done on the FC. Hold the throttle all the way down and to the right for a second or two and it should arm. I think by default the motors will spin at minimum speed when you've armed it.

Thanks I'll give that a try when I get home

>>1182561
Ive done it. It lives. Thanks a bunch

>>1182235
>Is there any way to leverage very high RPM to generate thrust?
Thrust, yes. /efficient/ thrust, no.
>Is there any configuration where small diameter ducted fans can generate efficient thrust?
No. It's physically impossible. Small is fundamentally inefficient. Ducts do help efficiency for a given diameter, but at the end of the day diameter/disk loading is king.
https://en.wikipedia.org/wiki/Disk_loading

>>1182643
it took you a year to ask the question?

>>1182734
what do you think of using 7 blade propellers on a quad copter as opposed to the usual 2 blade ones?

Are there single eye "goggle" for drone flying?

>>1182857
whats wrong with double eye?

>>1182874
It would be nice to be able to go out on a walk, seeing the drone with one eye and where you're walking with the other.

>>1182878
kek

>>1178929
>>1178945
This actually looks fake to me. That bomb did much more damage than it should have. Either it got really lucky or they blew it up themselves with explosives stuffed in for a propaganda video.

>>1182992
The vehicle was carrying ammunition.

i have $500 carbon fibre blades for my octocopter. thoughts?

>>1182854
Yeah, it literally did. I bought 2 new boards and an extra receiver and rebuilt the thing 4 times before asking. I admit it was autistic. But... what can you do.

why is it difficult to find an LED lense system like you see on phantom 4s?

>>1182992
I thought the same thing when I first saw it too. But it's hard to say for sure how big their bomb actually is. I know they're using piddly launcher grenades for the most part since that's all your run-of-the-mill Phantom can lift, but this one could be a modified mortar bomb with a fair bit more boom.

But either way I still think the only reason they're resorting to this shit is because their stockpile of Saudi-supplied TOW missiles is drying up. They're on the ropes.

>>1182855
Fairly neutral. Aerodynamically-speaking, fewer blades is marginally more efficient at subsonic speeds due to boundary layer effects, but it's barely worth mentioning. Shock waves can be very lossy, so if your blade tips are transonic it may be worth increasing blade count and decreasing RPM to avoid that.

In the holistic view of the whole propulsion system, changing blade count can help the prop's RPM range (for a given hover thrust) match up better with what your motor (and if applicable, gearbox) run best at. With electric motors, efficiency peaks with the motor loaded down to around 90% of no-load RPM, and power peaks either at 50% of no-load RPM or wherever thermal limits are reached. Where in this range you choose to load your motor to will depend on your priorities.

But again, diameter is king when it comes to efficiency, so if you're choosing between a 5-blade 5" prop and a 2-blade 6" prop (which should have similar RPM ranges - http://web.mit.edu/16.unified/www/FALL/thermodynamics/notes/node86.html#SECTION06374200000000000000)), the latter will give you more flight time and thrust per watt.

>>1182857
They exist, yes.
https://www.youtube.com/watch?v=w18P8B1ISaU
https://www.youtube.com/watch?v=LI1VgPv7URo

>>1183231
Forgot image.

I broke my 50/50 / 70/30 throttle accident hymen today, with an X-maxx.

I had fiddled with the control yesterday and set it at 70/30(while programmed for 50/50) so I would remember to change it today.

Thankfully it flipped itself so it just laid on it's back and didn't run off into the distance.

Is this the RC worlds version of negligent discharge?

>>1183231
>their stockpile of Saudi-supplied TOW missiles is drying up
Too bad they're now getting a fresh supply of fighter jets and modern American missile systems from that weapons deal your president signed.

>>1183291
>Is this the RC worlds version of negligent discharge?
One of several, yes.

Odd, last time with my x-maxx I think the car went into low voltage warning after 8-9 minutes. I had charged them from storage to balanced.
This time I had charged them to balanced without putting them in storage. The batteries lasted 40min+ and probably more, I had to leave.

Faulty batteries/charger? Same kind of driving, same kind of weather.

>>1183636
What's the others?

>>1183746
>What's the others?
Stomping on someone else's FPV frequency (or formerly, RC channel back in the FM days)
Plugging in the vehicle before turning on the TX (though this is way less of a problem than it used to be)
Other variants of oh-fuck-motors-turning related to yours, such as having the throttle channel reversed

There's others I'm forgetting, I'm sure.

>>1183848
So we'll be getting spread-spectrum FPV cameras in the future?

On an RC receiver that outputs pwm, are the pulses sent out simultaneously or one after the other, like in ppm?
The reason I'm asking is I'm trying to read them into an arduino, but my function isn't working for reading multiple channels. If they're transmitted simultaneously, that would be the problem, but if they do go one after the other, which is what I thought they did, it wouldn't be.

>>1183887
There are already a few... Lightbridge, Connex, a few wifi-based systems and such. Seems they've still got a ways to go though.

>>1183998
https://www.youtube.com/watch?v=XhIdGKXoOhc

would it be a good idea desu to mount one of these to each of my quadcopter arms for night flying and have them aligned with the axises of the arms or do you have a better idea?

>>1178182
>attach jug of demosser to a drone
>stick a few holes in jug
>fly drone over roof as jug unloads
>???
>demossed roof

dumb or genius?

>>1184097
i would do that but with semen and fly over the netball field

>>1184070
That is exactly what I needed, thanks anon. Wish I had an oscilloscope.

>>1182734
>No. It's physically impossible. Small is fundamentally inefficient. Ducts do help efficiency for a given diameter, but at the end of the day diameter/disk loading is king.
What about more unconventional topologies? I was looking at those silly over priced dyson fans, they appear to move similar amounts of air to conventional models, however they have a very small high rpm motor and impeller. Efficiency appeared favorable. Could a turbo impeller + 100krpm motor leveraging high pressure air and boundary layer thrust be a viable? The vanes to direct the air will weight more than a conventional prop, however the high rpm motor will have a better power to weight ratio than a slower motor with more torque.

>>1183848
>Plugging in the vehicle before turning on the TX

What would happen?

I've been away from the hobby for like 15years now.

I am looking for some advice.

I am new to the world and rather than buying my own RC plane I prefer to build one, true spirit of DIY.

I chose a high wing, top engine belly lander for easiness, but I cannot make it take off. The engine is powerful enough, the propeller is the right size 9x6. I believe the problem is that the engine has the wrong angle and it should have a bigger angle to counter the tendency to pitch down.

Any advice?

>>1184199

>>1184199
>>1184201
At first sight the propellor and wing produce both a negative pitching moment while your tail doesn't seem to counter it that much.
How are you launching it? My guess is it would do a nice nose dive if you'd throw it. Are you taking off from the ground?
As for advice try giving the tail some proper negative AoA

>>1184228
I have tried in concrete to belly take off, the plane slides but never takes off. When launching it it instantly went down.

Would giving the engine more angle work? Because modifying the tail will be more difficult than the engine. If the tail has to be reworked that is okay.

>>1184236
You mean you tried to launch it by letting it drag itself over concrete? The friction from that is too much, it wouldn't be able to take off. You need to either give it wheels or launch it by hand. If it instantly went down, it means it naturally pitches down. What you want to do is adjust the wing and tail to provide a neutral pitch. You'll also want your centre of mass to be located roughly between the front 1/3 and 1/2 of the wing.

>>1184240
>You mean you tried to launch it by letting it drag itself over concrete? The friction from that is too much, it wouldn't be able to take off.
You can get away with that though if you have a lot of power. I would at least try that method especially if the pitching moment is questionable
But yeah adding wheels might also be a good idea for that anon

>>1184243
So I have modified the plane. Mostly I have cut the front nose and lowered the engine close to the wing, gave it far more angle and moved the CG a little bit backwards, from 25% to 33%. The plane on one of the launches did glide for 2-3 meters at 50% throtle with neutral attitude. However when I tried with more power it pitched down and crashed. So I believe even if it got a more neutral thrust it still needs a fix and I am going to redo the tail with a bigger elevator and give it a negative AoA and see what happens.

Is there any point in trying to balance the tires on an X-maxx?

It looks a bit too shaky.

>>1184331
>The plane on one of the launches did glide for 2-3 meters at 50% throtle with neutral attitude. However when I tried with more power it pitched down and crashed
Well yeah, obviously. I'd try to put the engine in line with the rest of the wing so you don't have to deal as much with pitch shenanigans
Also if you had cut the throttle it would probably have stalled

>>1182554
>>1182556
This:

Mine is set to arm by flipping a switch on my DX6. YouTube is your friend.

I got the chance to trade a brushless converted kyosho inferno g2, mamba xl 8s combo for a sidewinder 3 combo rustler. 6s battery, no charger(i got one).

He says he has spent around 1400usd on it, while I got mine for 350 used, added 150 for battery+charger and a new servo.

I want a onroad car. Granted, my rustler handles that, but could I make a great deal out of this?

>>1184199
>>1184201
Reminds me of the old Berkeley(/SIG) Sinbad glider.

>>1184331
So you tried to pull up and it still wasn't enough?

I recommend doing some glide tests next time to help isolate the problem. If it glides fine and handles well without power and only misbehaves when there's thrust, then you're probably on the right track; otherwise you probably have a more fundamental problem.

It is hard to get rid of the power-pitch coupling with a motor location like this (so close to the CG). Often you just have to compensate with elevator and live with it. It works fine enough on motor-gliders and such with relatively underpowered motors, but if your plane is overpowered or has a small elevator (at least one of which sounds to be the case with your model), then you may only be able to use partial power before the controls get overwhelmed.

>>1184340
>Also if you had cut the throttle it would probably have stalled
Nonsense. If thrust is pushing your aircraft out of control, reducing thrust is absolutely the proper response. Saved my ass just a few weeks ago when my twin lost a motor in flight and entered a momentary flat-spin.

>>1184655
If it's flying horizontaly at 50% throttle and kisses the ground at 100%, then the plane doing a backflip at 0% doesn't seem that unlikely to me

For a big pay load, you need to remote control a big guy.

Fucking batteries.

Got a blade inductrix fpv. Flight time sucks, looking at buying more batteries.

How the fuck do I safely charge 6 of them at once? I don't know enough about lipo batteries or the chargers available to know I'm getting something that will handle 6 1S batteries at once

>>1185305
My batch of 1s came with a parallel charger 5 at once but I looked for a bundle deal. You need a parallel charging board to go with a charger.
https://youtu.be/7wj-EB4-71M
With 1s amp rating isnt to much a problem just remember the charger has to supply for all at once.

>>1185305
>How the fuck do I safely charge 6 of them at once?
Parallel charging? Make sure they're all close to the same voltage when you plug them in. From then on it's pretty safe and easy.

I'm surprised nobody's come out with a parallel board which has built-in diodes to make it COMPLETELY foolproof.

So... old lady at work heard me talking about drones to other coworker. Said last summer a fancy quad crashed in her back yard, destroyed a flowerbed. She was pissed! Chopped the shit out of some just blooming prize winning tulips or something.
She put out flyers saying lost drone, hoping to get to chew out the pilot. This was last year. Right?
So anyway she said I could have pic related for $100. (DJI Phantom pro with minor scratches and dryed flower carnage)
Sure I got to save up for a controller and battery charger. But I think its a good deal in salvaged parts alone. Yes?

Pic upload problems

My ESC(sidewinder3 combo) kept overheating on warm days, even on 2S.

DIYd an old spare part as a platform to do better cablemanagement and mounted the fans ghettostyle.

The fans doesn't spin too fast though. Does the receiver emit lower voltage than the battery supplies?

>>1185990
Yes. Well, sort of.
To be perfectly accurate, the receiver isn't actually supplying the voltage, just carrying it. The power usually comes from the ESC's built-in 5-6v BEC (voltage regulator), then powers the receiver and all the servos through the middle row of pins.

>>1186114
Oh, you learn something every day.

But 2 more volts can't provide the amount of fanspeed I was expecting anyway.

I'll give it a test this weekend and see if the fans made a difference.

>>1181878
The same as a 40mm standard grenade.

>>1184108
>What about more unconventional topologies?
Certainly there are other ways to make a small impeller effectively interact with a larger volume of air, yes. A lipped duct is one example of this. But no matter what you do, you're still bound by the fundamentals of momentum theory, which are inexorably limited by the dimensions of your contraption.
>I was looking at those silly over priced dyson fans, they appear to move similar amounts of air to conventional models, however they have a very small high rpm motor and impeller. Efficiency appeared favorable.
Favorable compared to the impeller alone? Sure. Compared to a fan of similar diameter as the ring itself? I highly doubt it.

Even so, I myself have been kinda curious about flow entrainment recently - not just in regard to thrust augmentation but also for blown lift. Haven't had much luck finding information about it though.

>>1185971
phantom 4 pro? you didnt post pic

>>1186973
I think its a 3. The pic is under the post.

>>1185971
>>1186973
>>1187280
It's a 3 Pro. They're still selling for $800 new. You can get a transmitter for under $300, the chargers are cheap, but it looks like their proprietary "intelligent" batteries are around $100 each.

>>1187624
Im more concerned about re-registering a found drone. It wasnt bought from the owner (who never contacted the finder a year ago).
If seen battery mods and that one has been sitting on 1 bar for a year so it may be toast. Im wondering if I should just think of it as four good $25 motors w/props and a free frame. Looks like I cant even log into the camera with a phone unless I have the light bridge controller to plug into. A bit heartbreaking when looking at a 4k camera on a gimble mount.

I just realized my car doesn't do the lipo-amount beeps.

Isn't that standard?

My traxxas charger fan has started sounding broken.

I feel bad for it, sounds like it is in pain.

Time to google a fix. Don't have warranty.

>>1187786
Well ok, it was just the bearings that was rusted for some reason.

Only had wd40 on hand.

Do you guys have any recommendations for oil and grease for rc gears btw?

>>1187793
Use baby oil for bearings, it works pretty well in my experience. For your gears, just buy something labeled for it. You don't need to grease the pinion or spur gear (in case you didn't know), but WD-40 is pretty good at cleaning them off if they get really gunky from mud and stuff, just rinse them afterwards so the WD-40 doesn't gunk up itself after a little while

>>1187806
Baby oil? Well now that I think of it, it's pretty longlasting.

So regular grease for actual cars works?
There has to be a size difference in particles, thickness?

>>1187846
No I think they make specific labeled compounds for RC cars, I'm not sure though.
To be honest though I'm sure any paste designed for powertools would work, similar componentry

>>1187846
I wouldn't risk it. It cost $10 for a jar/bottle...

p.s too much grease can cause motor to heat up quicker so apply light coating only.

>>1187851
Ah yes good idea! Powertools run more than an rc car.

>>1187999
Is 10usd a bottle a good price?
Just like any other "adult boy" hobby, things are overpriced.

Not saying it's expensive, but why pay more for something that you can get cheaper.

But any rc grease works?

>>1188002
Yep. I have used some stuff that came with a Makita skill saw and it worked fine. Don't go out of your way to buy it, I'm just saying if you have it around your house already might as well use that instead of buying grease marketed towards RC. But if you don't have anything around just buy RC shit, its a safer bet and it's still cheap

>>1184110
On 2.4G digital? It woud beep telling you it can't find any transmitter signals.

Decided to buy my first big drone, a Quanum Venture from Hobbyking, deluxe set with Naza Lite and fatshark video. Planning to replace props right away to APC 10x3.8
Any other tips for starting out? I am well experienced in fixed wing and soaring (F3J-F5J-F5J-400)

>>1188248
i had looked at that my self at one point due to the bargain clearance. seems like a bit of an air elephant though on account of the weight.

>>1188357
I'm not worried much on the frame, I can build a good and even foldable H- frame from a few pieces of wood if needed. Still the frame itself looks spacious and the setup costs way more to buy piece by piece than the whole deluxe set.
Now that I read further on it, the front cover needs a bit of adjusting, taking off those ugly edgy wings. Some say it is responsible for high speed yaw spin-outs. And a few lightening holes won't hurt as well.
What seems troublesome is upgrading the video system with an OSD, GPS, distance and other stuff. What I read the iOSD is the simplest one, but I would need some sort of hub for the Naza Lite (that I plan to upgrade to V2). Is there another OSD that I can use with the Naza FC?

>>1184076
Buy a night CCTV camera instead and save yourself the time money and hassle from the inevitable crash

I know this is a stupid question, but can anyone confirm for me that latency increases the more you add distance (2.4ghz)

>>1188659
I do have a better idea. Put red LEDs on the rear and white in the front. A lot easier to navigate with than a bunch of flashlights.

>>1188667
No. Latency is the function of the electronics modulation/demodulation not the distance.

>>1188659
how do night cameras work if there's no light?

>>1188659
I just read here that night cameras work by illuminating the area with its own infrared light. so i doubt it would work on a drone since it would be too much area for the light emitter to illuminate


https://www.howtogeek.com/291282/how-do-night-vision-cameras-and-goggles-work/

>>1189018
I hear the runcam owl is a .0001 lux b/w camera for under $100. Even without illumination it has ridiculously good vision. You mix that with an IR spot option your in good shape.

my OP pic is actually this including gimbal. thoughts?

https://www.rcgroups.com/forums/showthread.php?2124992-Tarot-ironman-1000-with-professional-red-epic-gimbal

I finally have a permanent workbench for RC stuff now I've moved to a new flat, so much better than having to re-purpose my computer desk & pack/unpack everything whenever I wanted to build something :)

>>1188775
But theoretically the more distance/interference the more latency, right? How could this not be true? From first hand experience, the further I go out, the sketchier the controls seem

>>1189244
Your radio signals move at whatever the speed of light through nitrogen is. The time it takes to treat the signal in your RX and TX is many thousand times greater than the time it takes the signal to actually travel over the kinds of distances you can control your stuff at.

>>1189244
The signal gets sketchy because you receive a lot less of it. Imagine that you're sending out one watt of power in a cone aimed at your plane. At one meter range, the cone hasn't spread out very far and you can receive 0.75W power. But at 100m, the cone is very spread out and you can only receive 0.01W of power.

Look at pic, it's of a magnet. It's the same thing with radio waves. Close to the magnet, the field is strong and dense, so there's a lot more iron powder there. Further out the field gets weaker, so less powder is attracted to there. With your radio, the signal is strong close to the transmitter and weak far away. It has nothing to do with how long it takes your signal to travel there, what matters is how strong the signal is when you pick it up.

Imagine that your signal halves in strength each meter further away you go. Pretty quickly your signal is very weak. So the reason your signal is sketchy at long range is the same as why your signal is sketchy if you're driving from the other side of a wall: Less of the signal is reaching your thing.

>charge all batteries I have for my rustler and x-maxx
>go to family
>bro and his kids all go out driving
>5min of driving the rustler it breaks
>stone lodged itself around the steering cranks
>20kg servo doesn't give a fuck and snaps something apart
>take out the x-maxx
>5min of driving the slipper clutch is very loose

After attaching a second nut for the slipper clutch it worked fine though. Have to diy a fix for the rustler so no rocks can get in there.

don't mind me. sensor monster coming through.

>>1189283
>>1189288
Thanks guys, that makes a lot of sense

>>1182149
Qx7 will be a good transmitter regardless of where the hobby takes you. The tiny whoop is fun but won't teach you a thing about racing in acro. You can get cheap goggles for $50 and a cheap quad like the wizard (full size) or aura 90 for flying through the trees and inside. This way you don't spend too much money on a quad you WILL break, And see if the hobby is for you. If you stick with it, your likely to have fun.

>>1179007
I hope those aren't li-po's on the roof, that shit looks like a firebomb

>>1178182

>>1190292
Nice.

What kind of specs?

Brushed, brushless?

where do I buy 3 inch carbon fibre propellers from?

>>1190608
Why would you want 3" carbon props? Pretty much the only benefit of carbon is rigidity, which doesn't become a consideration until you reach at least 8".

>>1190621
because my plastic ones keep breaking due to me overtightening them but they fall off if i undertighten them. I wish spring lock propellers were standardized in the RC world (like the ones on phantom 4s).

>>1190675
>because my plastic ones keep breaking due to me overtightening them but they fall off if i undertighten them

Then you're doing something wrong. You're using nyloc nuts, right?

thoughts on mounting laser pointer onto drone for night flying? (not for illumination just to tell which way it is facing)

>>1190973
Horrible idea. Put some high powered LEDs or figure out headless mode.

Which one for first goggle?
Quanum Cyclops V2
or
Quanum DIY goggle V2 Pro set with updated neoprene glove and Quanum RC540R diversity receiver

Will be getting a pair of Fatshark circular polarized antennas for both setups as well as a couple of 2s batteries.

>>1178958
Man, training a bird to just fly with their claws slightly above the target, instead of actually gripping it like they've been doing since forever, that must be fucking tough.

Converted my old ZMR into a Y4 today, super fun :)

>>1191261
How is the turning rate compared to the normal quad or the classic tricopter designs?

>>1191265
I've only hover tested it LoS so far, FPV gear is still to go on, so I can't really compare yet to my tricopter or my other minquads that I primarily fly FPV. It felt a little sluggish, but not a night & day difference - then again, they're only piddly little 1806 motors, so it was never going to be a rocket.

>>1178958
thats super cool

>>1179767
thats cgi though
that doesnt count

>>1191311
Kinda new to this hobby huh?

>>1182992

>implying ISIS would fake a video for PR

https://www.youtube.com/watch?v=3HCFol7g-FU

i want to attach a 24mm motor mount to my 14mm carbon fibre tube arms. i assume there must be an adapter that slightly enlarges the diameter of the arm at a point so you can do this. what is it called?

>>1191459
>hilary clinton
>jewish

>>1191519
an adapter

>>1191519
>>1191583
You probably want to search for 'motor mount'. If you were using 16mm arms, you could use Tarot mounts which are widely available.

I just realized I put regular grease into my differential.

I need actual diff oil don't i?

>>1191630
Figured I'd check out the servo for a possible upgrade.

Getting to it was fun...

Gonna scrub it all down.

>>1191199
Anyone?

>>1192288
Why would you buy overpriced FatShark antennas for cheap goggles? Just buy Aomway/Realacc CPL like everybody else.

whats difference in performances between 2205 and 2206 motors?

>>1192306
Nobody cared to answer so I went and ordered the DIY goggles with the autoscan non-diversity Quanum receiver and a pair of Aomway RH CPL antennas.
Will find a /diy/ solution to reinforce the antennas with fatshark-like covers and PU foam.
Looks like the Aomway also outperforms the VAS/TBS and Fatshark/Immersion antennas as well, maybe later on try out a couple of the new pagoda style PCB antennas as well.

>>1192338
>Will find a /diy/ solution to reinforce the antennas with fatshark-like covers and PU foam.

They really don't need it. I only broke my first one a few weeks ago, after flying it for at least 6 months with plenty of nasty crashes. The most you'd want to bother with is just dipping the end in PlastiDip.

>>1192371
I live in the smelly armpit of eastern Hungary. There is no option for plasti-dip here, though wanted to try it out for some time.
As I see it, ping-pong balls, some coroplast and PU glue mixed with a drop of water will do the trick quickly and effectively.
What I am concerned about is that the wires are not raw copper but nickel plated and the soldering won't hold up much, even with the plastic brackets, hence why I'm thinking of reinforcing it right away.

>>1192388
I literally flew mine into trees & concrete for 6 months without breaking it. Don't waste your time with ping pong balls etc. If you can't get PlastiDip just squeeze some hot glue over it if you're that paranoid.

>>1192434
Mine will be about 1kg and a 450 size, so if it crashes it will crash exponentially higher impact on all its parts. I am more worried about hangar rash, since most of my planes suffered damages this way.
It's not the crashing why I want to reinforce it, it is to stop any parts getting caught up in the lobes or squeeze them and popping them off.

I have Sky Eye RC plane that has dual ailerons per wing as in picture. How do i hook it up to my apm 2.8?

If i hook all servos to same out put wont that mean that they all move up and down at the same time?

>>1192663
anyone?

>>1192663
The aileron servos are (or should be) mirrored by design. Since you have the plane, just hook them up and see what happens.

I changed out the diffoil in my x-maxx to 30k cs.

It's is incredibly tough to turn by hand.

One of them seemed to have "ceased up" when I found out it was the rubber gasket inside the gear. It was expanded and didn't quite fit, but I managed to get it to fit after a while.

So all seems to work like it should, just very hard to turn which is what I've read it's supposed to do for bashing.

But how is this not very straining for the motor?

>>1178929
it's fake faggot

Is there any way I can drive with one hand free?

I'm contemp!ating getting a spare transmitter and break it down to make a one hand controller.

>>1193076
You could develope new skills like the disabled dude in this vid.
https://youtu.be/TClOCky3xEI

Or perhaps mod your current controller with a port to a one handed version. Splice a line from every button you want and wire it to a custon hub. Plan it out to figure how many leads it will take. Then find a connector plug with the amount you need. It would be pretty cool to set your transmitter on your lap and wave one hand around. Like the shift controller.
https://youtu.be/3Ue5ikYML60

>>1193143
It's for cars, so it can be very simple of a controller.
Can't imagine it being easy flying drones one handed.

I've seen that kikestarted thing, iirc it was pretty bad too?

Anyway. I birthed an amazing idea last night that I might actually might attempt to patent. I have to look into it and see if someone else hasn't made it already.

>>1192663
this >>1192764 is part of the answer. Aileron servos are usually mirrored so that they can get the same command, but move the control surfaces in opposite directions. Hook them to a Y-connector and plug that into channel 1.

Put in a 32t 76t combo for my rustler.

I need a longer empty street..

Upgraded the servo.

I'm guessing the travel time speed is pretty close among all servos? The time to reach 90degrees from 0.
The rapidness is definitely better, I wonder if the TSM is fast enough to make use of it. Never thought of that.

Probably dumb questions.
Why no four hub motors and all wheel steering like modern hypercars?
Seems we live in the age that computer controlled suspension isnt far fetched. Why no servo actuated suspension systems run by gyros?
At RC scale would ducted fans work instead of spoilers/wings for on demand down force at acceleration?

Current plan for me to get into quad is to by a dx6, fatshark attitudes, and build an FT gremlin. Once I get used to not crashing it, I want to build something bigger.

Opinions/advice?

>>1192764
>>1193348
Thank you! I was puzzeled because hobbyking had installed one of the servos in wrong direction and the ailerons appeared to be doing weird things.

Everythings good now and i think i will get to fly this weekend.

>>1193529
>Why no four hub motors and all wheel steering like modern hypercars?

Unsprung weight is a bad thing. Hub motors are okay for smooth drag strips, but having 200lbs+ of iron, copper, aluminum, and rubber just bouncing on the end of an axle isn't good for any of the involved parts. Not to mention handling.

And as far as RC cars go, the motors are already so ridiculously powerful for their weight that it's usually better to improve performance in other ways.


A lot of what you're describing has already been done by niche groups or individuals. I believe, for example, the robotic mouse maze guys (or at least some of them, when the rules allow for it) already use fans to provide substantial downforce on their bots.

>>1193786
>dx6
FrSky >>>>>> dx6

>>1193786
>dx6
FrSky >>>>>>> Spektrum

>>1193529
the spring in suspension stores energy when they compress. it's that energy which is used to push the car back to its original position after passing the bump. where would the energy come from in an actuated system?

>>1193524
Nice babby RC. Did you buy it for your son?

>>1193786
Spektrum is the cancer of RC. Avoid as far as you can.
The new standard in RC is FrSky, Taranis X9D or QX7. Get the hall sensor gimbals as well. The old standards were Futaba and Hitec, but those are just plain too rigid for quads, not many options to program properly. I switched to Hitec Aurora 9 from my Turnigy 9X a couple months before the X9D came out, still regretting it. Have an old Futaba FF8 with FrSky module, the comm system is as robust or more than the "big brands", they just set the new standard and the brands just fail to adapt. With Spektrum you can be sure that your receiver will drop connection or plain freeze causing you to crash or fly away. They are just badly designed and too overpriced.

>>1194150
What the fuck did you say about me and my son?

Bitch, my car will wreck your car any day!

You me, 1 on 1 race right now!

>>1194154
>car
lol you think you're a badass with a toy car? Try flying F3J in the finals every single time and then run your whore mouth!

>>1194170
A cardboard plane, badass?

Pfft!

I can pull a REAL car with this car!

What key words am I look for when trying to run extra servos/motors off a quad?
If I got a 16 channel rx/tx can I split half to the flight controller and half elsewhere?

>>1193876
>>1194152
Thanks all, I did more research on this while away and came to the same conclusions. I have a Taranis Q X7 on the way.

I will be researching batteries and chargers next, as that is the only part I haven't really looked into yet. Will probably be getting a couple 2s to start, the Gremlin is a very small quad.

i just bought a minidrone and am trying to learn to fly. is it true that the more expensive drones have stabilization logic in the firmware that makes them easier to fly? this cx-10a is kinda garbage at staying stable, but i'm also a shit pilot.

>>1194503

all multi rotor drones have intertial sensors which are used to stabilize them. It's a physical piece of hardware that thanks to billions of dollars being invested into military automous missile guidance systems over the last few decades we can now use those same devices to make drones possible. We would be nowhere near having such an advanced sensor if it wasn't for the billions that got spent on research in the military.

>>1194510
It's more down to the controller than the quad itself. Many of these cheap micro brushed quads are incredibly hard to fly properly with their included tiny controllers, but fly remarkably well on a 'proper' controller. Case in point, I struggle to keep an Eachine E010 in the air with its included controller (what do you expect for $15 I guess) but when I bind it to my Taranis it flies like a dream.

>>1194533
Is that screen one of those for videography?

I've been tempted to get one. As well as getting a drone.

Does this combo work good?

>>1194535
It's just an alternative to using goggles. I use it when I'm flying my E010 indoors with other people around, as it lets other people watch & makes me more approachable to strangers. I also use it with my 650 as well to frame the video whilst I fly it largely LOS. But for flying freestyle I always use goggles.

>>1194533
a taranis flight controller? or do you mean transmitter?

>>1194538
I meant transmitter, I was just saying 'controller' as that's what a lot of people new to the hobby tend to call their transmitter.

Never done anything rc related but I am interested. I have several 9g (SG-90) micro servos with a few broken gears and whatnot. If I disassemble them and take the small dc motors out can they be used for a tiny quad drone blade motors? Anyone have any experience on them.

>>1194576
I doubt the motors themselves would be anywhere near fast enough. You're looking at minimum 10,000kV for a brushed micro.

>>1194576
It's a much better idea to buy a $15 chink tiny quad than to disassemble servos and try to make them into a quad

Quickly put some FPV gear on the Y4, hope it doesn't rain all day tomorrow :)

>>1194789
do you have to disarm it right above the ground to land with that bottom rear prop?

>>1194811
Not broken one so far, landing on level soft ground & disarming quickly. Taking off is more of an issue, because if the bottom prop is blocked it can't take off.

>>1194789
for I tricopter, i guess you could make the non servo mounted motors more powerful than than the other one if you wanted to, couldn't you?

>>1194789
for a tricopter, i guess you could make the non servo mounted motors more powerful than than the other one if you wanted to, couldn't you?

>>1189715
sick™

>>1194818
>those grass blades flying

Looks like you are one rock away from a broken prop. Have you thought about sticking some little legs on it?

>>1194533

was considering doing a yaw mod to my cx-10a transmitter to help with control. good to know it's mostly the controller.

I've bought most of what I need to get started, I'll probably get some batteries locally. Eventually I'll build a bigger quad, hoping to get into rc planes as well.

>>1195000
planes are teh gay

>>1194830
If you mean in the sense of not having to balance the torque of the tail motor with the front, then I think you're right. The 5-motor 'dragonfly' design can be implemented by splicing the ESC signal wires of the front pairs of motors so the flight controller still thinks that it's an tricopter & only has 3 motor outputs.

>>1194885
Maybe, but if broken props becomes an issue it's quicker to just put DAL props on.

I'm looking into getting a on-road car.

1/10 to 1/8 size.

I won't be doing any indoor racing, so it's mainly tarmac out in the public. So it has to be a bit durable at least.
I also want it to be pretty thing, so availability of bodies and tires are important.

While I use my other cars to bash and have no care of cosmetics, this will be my pimpmobile.

>really want to build and fly RC
>8-year old Esky HBFP v1 is broken beyond commission
>loaner Dynam Sbach that is half-assedly restored by yours truly breaks at landing gear mount on it's first take-off attempt, also I am afraid that it would be too fast and too agile to learn on
>blew my little third-world savings for a basic bitch Flysky i6 package, with nothing left for the powerplant and electric systems

To be fair, I am in no place to complain, but I really do suck at anything.

Any cheaper alternative to micro scicky?

I love when it doesn't rain at the weekend~

>>1195198
Are these things able to handle a gopro and fly the same?

>>1195259
You can definitely notice a difference, but the extra weight doesn't make them fly 'worse'.

>>1195195
Unless I was too vague. What is the cheapest flight controller you can get for a small diy quad?

>>1195615
>micro scicky
Well the scisky is $20 on banggood with a built-in receiver. You can buy eachine etc. brushed f3 controllers for about $11 but they don't include a receiver, so once you've added that to the price it probably isn't any cheaper?

hobbyking has some very high wattage high KV motors on special for $10 down from $30 AUD each.
When you think about it a 3000kV motor that runs at 12V max is just a low throttle resolution version of a 1500kV motor that runs at 24V max assuming they have the same max wattage.
therefore high kV just equals shitty throttle resolution and probably cheaper.

>>1195621
Except a 3000kV motor is designed for a completely different prop than a 1500kV motor, so it's not really a useful comparison. And what does kV have to do with throttle resolution? On the same radio/FC/ESC, a 3000kV motor will have exactly the same resolution as a 1500kV motor.

What is it that controls the fine adjustments of a motor speed, high KV motor, esc or the transmitters speed control?

I'm wondering since I can't run my car at very low speeds, it just stutters. Which makes me think its the amount of KV for the motor.

>>1195264
I'm guessing I can not fly like that with a drone that has to carry a 1kilo payload..?

>>1195783
I mean, people fly 1000mm class drones (which will easily heft a 1kg payload) in a similar fashion.

https://www.youtube.com/watch?v=ry4MC_c85-A

>>1195821
Bigger monsters than that exists.

https://www.youtube.com/watch?v=VIi_vuzmOSY
Still fairly agile.

is there such a thing as a pseudo helicopter where stabilization is provided by surrounding mini blades in a quad copter configuration but then the middle large blade provides most of the thrust and runs on a very large pancake high torque motor and the middle blade is fixed pitch?

>>1195821
That got me excited.

I suspect it's gonna be like a 1200usd ish budget though.

>>1196054
Nah. My 650 setup (>>1194536) was substantially less than that with a Pixhawk, separate telemetry radio & a gimbal. If you're going for a racing/freestyle build with a regular $30 flight controller, no telemetry radio, no gimbal, etc. it won't be ludicrously more expensive than a regular miniquad. Batteries will obviously be more expensive though.

>>1195976
yet another Flite Test video.
https://www.youtube.com/watch?v=FVwedVUWFz0

also, this article
http://spectrum.ieee.org/automaton/robotics/drones/iros-2013-should-quadrotors-all-look-like-this

>>1196058
I have a camera and gimbal setup, which is about 1100g.
I have a bunch of 2-3S batteries, quite large and heavy though, 300-400g ish.

I'm guessing I should look for kits rather than finished models?

>>1196060
If you're talking about lifting 1.1kg then 4S is probably the minimum you should be thinking about.

And you should definitely be building yourself for this sort of project.

>>1196064
Is there a popular forum where I can go deeper into this?

>>1196065
https://www.rcgroups.com/forums/index.php
https://www.reddit.com/r/Multicopter/
http://forum.flitetest.com/forum.php?styleid=35

So I have a FS-iA6B reciever lying around. Probably a stupid question but how would one connect a small dc motor to this thing with adjustable throttle. I dont have a separate controller now.

>>1195264
>red Aomway
That's not an Aomway. Try Pagoda antennas instead, much more steady signal than those cheap knockoff chinese antennas, even trashes Fatshark and TBS antennas.

>>1195000
If you want to get into RC planes I suggest looking into built up F5J-400, F5J or ALES class gliders and get some local help figuring out the CG that works for you. There is nothing more challenging in fixed wing than looking up invisible lift zones and staying up an hour or more from a single battery power.

>>1196108
You use a brushed motor ESC. No other way around it.

>>1196108
Either get an ESC or an arduino with a MOSFET connected

>>1196115
>>1196119
Well how bout just one speed? Tried all the pins and the motor just started spinning right away when I connected it with no way of stopping it.

>>1196123
It doesn't work like that.

>>1196123
The receiver outputs a very retarded signal, you need something that can decode that signal. You could hack a servo to turn the motor on and off at best.

>>1196124
>>1196125
Ok, thanks.

>>1196125
>retarded
nice try explaining how things work. or were you explaining yourself?

>>1196123
You connected it to the plus and minus power contacts. The control signal is different but servos need the power lines as well. Look up PWM and PCM control signals and RC electronics.
Also don't do that random connecting the DC motor to your receiver, to much amps driven through the board will burn the sensitive electronics out. We use a separate power board for the more beefier servos as well.

>>1196127
Thanks. Basicly, I just wanted to make a small rc car with the receiver before my first quad kit arrives. The receiver came with the fs-i6 controller. Have a bunch of 9g servo motors and a 3d printer lying around. Couldv been fun.

>>1196112
>That's not an Aomway.

That one's an Aomway, I have some of the Realacc ones as well which I'm pretty sure are from the same OEM even though some people claim they perform better. Been flying them for at least 9 months now, solid signal & super durable. Everybody I know that has flown pagodas says they're great until they take their first proper smack then they suck.

>>1196112
>>1196138
Oh btw blue ones are SMA, red ones are RP-SMA. Banggood sell both.

>>1196139
Ah, that explains it, I get my stuff from Hobbyking.
The Pagodas I have in the mail from Poland has a more durable build as well as beefy printed casings, will se how they perform in the club.
Damn customs are sleeping on my quad, took them a week from sending in the documents by email! to actually start doing something with them.
Welp, I still have a MP Twinstar to rebuild with a new fuse/wings, a MP Tucan to build from scratch and a Genesis 3000 F5J/ALES to reprogram and set up. At least the exams are finally over.

Finally we can use drones with cameras again in Sweden.

When they started to appear on the market they quickly got banned because muh feefees.
But in august it goes back to normal.

>>1192328
>whats difference in performances between 2205 and 2206 motors?
https://en.wikipedia.org/wiki/Motor_constants#Motor_constant
Generally speaking, a larger motor will usually have a higher motor size constant (but not always, as other factors such as magnet strength and air gap can affect this constant too). In practical terms, this means that for two different-sized motors with the same KV, the larger motor will have lower armature resistance and higher stall current, and will therefore draw (and output) more power under load.

Note, stall current is also affected indirectly by KV. So for two motors of the same size, even though the higher-KV one will have a lower torque CONSTANT and make less torque per amp, it will usually still make MORE torque since it will draw more amps for the same load and supply voltage.