/diy/ - Do It Yourself

>>1184487
So let me get this clear, you are mounting it on the center with a screw/pin, then rotating it around into the router to cut it round?

>>1184678
Are you illiterate? He literally said he did it so that person didnt get (you)s.

>>1184590
>>1184598
>>1184599
I found some of my pictures and videos from when I took those notes, I don't want to upload the videos and pics here because they have other people in them, but if you need any details I can try and edit stills showing said details up close.

>>1184590
>>1184598
Part 2.
>-use bondo squeegee and roller from US Composites (or similar)
>-start @ a reference line on mandrill. It allows you to keep track of wrap #
>1. Mix up epoxy. - Mix thoroughly, for a min or 2. - dont fear bubbles
>2. Lay on thin layer of epoxy on bare mylar about 3" wide - think so it doesn't run.
>3. Lay fiberglass about one inch past marking line. - at edge. Get the edge lined up -it is less important if the middle sags
>-does not have to be parallel to marked line
>-use brush to "dab/mash" fiberglass down. Do not brush it.
>-Don't worry so much about bunched up edge
>-add epoxy and dab down where dry.
>4. Stipple stiched edge, then brush down. Then roll.
>5. Wet out new section with epoxy on brush, repeat process - then stipple raw edge.
>-keep whole process under 1/2 hours!!
>-watch for fucking bubbles. Bubbles are evil.
>-dont worry about glossy spots, next layers will absorb excess

>>1184594
there are 2 nationwide organizations in the US, NAR and Tripoli. Both have chapters in various cities. NAR do not support experimental rocketry, fuck them. Tripoli is the shit and are an amazing group of educated people in the hobby. The experimental stuff I work on with a club is through my university, and we compete at a collegiate level against various schools, including MIT.

>>1184590
I'm sorry about the files. I lost like 3 years of project files. CAD models, writeups, photographs, etc. ): Literally my most important folders on my computer.

As for the note pages, sorry I was rushing to write it, I'll transcribe at the bottom of this post.

The launchpad is a DIY build at that particular groups launch site. If you decide to build one, the rail is 1010 T slot rail. Thank you very much for the questions.

TRANSCRIPTION OF NOTES:
Part 1.
>-Snip ends of tubes - to get rid of fraying
>do not epoxy last inch or so.
>-cut with roller cutter - not razor blade
>-Store extra fiberglass
>-cover work areas with black garbage bags
>-mandrill is glavanized steel pipe, 1-1.25" with wood disks. Pipe rotates freely on stand
>-wrap mandrill with 1 layer of mylar -.5" overlap
>-seal seam with scotch tape
>-DONT USE PVC!! Buy cardboard from Red Arrow Hobby
DO AT THE ENDS OF TUBE
>blue painters tape at end of mylar, wrapped around end of pipe to lock rotation, and prevent epoxy from getting under mylar - use almost full width on exterior and add second layer to inside. Use short segments on inside to make attaching simpler.
>-set up ventilation before opening epoxy
>50" fiberglass, 60" mandrill.
>Lay fiberglass sheets on your work surface so the sewn edge lines up with edge of painters tape at one end
>pull glass over mandrill like toilet paper, not under.

>>1184569
I don't know how he got it, and I didn't ask. I'm fairly certain its from an obsolete model.

>>1182983
Hello, how are you?

>>1182770
Well idk. I get what you are saying with the weight balance but at the end of the day you are talking about running motors near the top of your rocket. I don't think it's so much the heat you have to worry about, it's the pressure changes. Fiberglass may be able to take the heat, but the sudden change in pressure? I doubt it if we are talking a motor with a high peak thrust.

You could mount motorS on the exterior of the rocket. At LDRS I saw this done, but it of course means forewings for mounting points, ergo the Cp will be drastically different than with a conventional design.

Fuck man, I think you need to mess with sims a bit and do some ground testing.

>>1182745
It's cool man, it's just this faggot Parker trolling me. He is still coming to terms with his love of all things phallic.

>>1182742
I am a student at a university and am in the club. That is how I made the connections and I have since designed and built this project on my own. I go through Tripoli because eventually I want to get to experimental rockets, and NAR isn't interested in that.

>>1182722
EXACTLY. The real one has a ton of weight in the nose from electronics and the payload which shifts the Cg. I had to add approx 2lb of lead to the nose to shift my Cg far enough ahead. It was a PITA. Before the weight, the motor would have driven it to about 2700' according to open rocket, after the weight was added it cut the estimated apogee to 400' and I actually hit about 350'.

My next rocket is definitely not going to have forefins, I only went with the sidewinder because after I retire it- it will look very cool hanging from the ceiling in my shop.

If you look at the pic linked below, the Cg is the tape line and the Cp is the dot.
>>1182446

>>1182467
To be fair, I was replying to him complaining about living in NJ.

Shoutout to my other thread which includes a little work with the lathe in OP.

>>1182331

>>1182444
Yeah, it came down about 30' up a tree. The main section dangled to only about 20' up, but we couldnt shake it out. Luckily, someone at the launch had a tool used for flipping breakers on powerlines, so I was able to get it down with minimal damage to the coupler on the electronics bay.

Here it is post recovery. It needs cleaned up a bit, some epoxy and fiberglass on a coupler, and it will be ready to retrofit for my level 2 attempt this Sept.

Thanks if you've read this far. If you have any questions ask away, I'll be lurking.

>>1182441
As the video showed, the rocket came down around some trees. The chute deployed about 3 seconds late, but never the less, it worked.

The parachute, if you are wondering, is a LOC Precision 50".

Here it is all wired up and ready to go. The rocket is 76" tall, and flying with an H550ST it had a thrust to weight ratio of around 12.5. The Cg was about 1.5 body diameters in front of the Cp, which lead to a very stable flight to approx 350 ft. The next launch will the with a significantly larger motor, and I am anticipating an altitude on that flight around 3000 ft. This was just a warm up flight for it.

>>1182435
here is the other side.

>>1182431
At this point, it is functionally all done. To make it pretty I got a lot more reference pictures, including a trip to a local air museum to get close ups of decals. I duplicated every single one of them. The layout is pic related. I tried printing on transparent sticker paper, but the color wasnt opaque enough to be visible. Then I tried iron on trasfers, but it was ugly. I want to get professional decals printed, but it will have to wait until the sept. launch because I ran out of time. Oh well.

>>1182430
I added a couple more decals to make it more apparent military hardware. (because the nose fins werent enough lmao).

>>1182429
I got the black down, then used several pieces of Aluminum backed HVAC tape to make a metallic looking accent for the nosecone.

>>1182427
There were a few fuckups on the paint, but the closest most people will ever see it from is 100+ feet away.

>>1182426
mmm I love that peeling feeling.

>>1182425
You can't prove I was spray painting in my dorm.

>>1182424
God damn it 4clan.

The letters are just cut from 3 layers of painters tape with a scalpel.