/diy/ - Do It Yourself

>>2709661
The first internal combustion engine was a 2-stroke piston type, that's slow, heavy, 150 year old tech. A Brayton engine could make a much more efficient foundry than any to date. Also, pistons require machining, unless you plan to rebuild your engine every week. You might be able to get away with casting a rotary engine like picrel with a flexible housing to seal it.

>>2693547
Tbf most technicians don't actually understand how they work beyond a superficial level.

>>2693751
Interchangeable parts came before machine tools. Usually involved a lot of filing.

>>2693854
I wouldn't use a piston engine, but picrel with a flexible housing. It could be made using hand tools, but would seal much better than early steam engines.

>>2517041
>Of course but this is /diy/ for fun not serious business. Nobody here is going to piss away the effort to make a wood-fueled turbine for the reasons it's been ignored by choice for over a century. Anyone who could make a serious effort is already in aerospace and would not bother posting on this joke board.
>This sort of /diy/scussions are just to amuse noobs with time to waste on foo projects, not actual work to do. They recycle the usual fantasies as if noob discovered magic the rest of the world somehow ignored.
Sounds like you're projecting your own lack of initiative/creativity.

>Likewise wood gas generators work but they're not particularly useful
They are if all you have is wood.

>How are you going to cool your turbine?
I wouldn't use a turbine per se for that very reason, but I suppose water injection would also do the trick.

>>2517079
>you really want the engine/turbine intake to be as cold as possible
For a wood gasifier, that would produce more power, but it would actually be less efficient, because temperature controls the rate of combustion. Slower combustion is less efficient and often incomplete. For a turbine, the compressor doesn't have to pump the wood. The expansion from a solid to a gas will actually produce power and wouldn't result in pumping losses like in a gasifier system.

>>1970480
>https://www.youtube.com/watch?v=Au_zRPr1wr4
Did that machine adjust the height based on the amount of resistance it encountered or was the vertical feed hard-coded?

>>1970512
>I feel like additive welding manufacturing is probably only worth it when it comes to massive parts where getting a piece of material large enough to machine down is cost prohibitive like fancy inconel type alloys.
Or combustion chambers with odd geometries.

I want to build a stainless steel quasiturbine (pic) with a pinion and annular gear connecting the driveshaft to the rotor. I imagine the pinion attached to the driveshaft, and the interior face of the rotor acts as the annular gear. I think a bandsaw is the best way to get a good seal between both the rotor and stator, but the geometry of the stator must also be specific to properly seal with the rotor throughout the cycle. What are some good resources on precise contour sawing with a bandsaws?