I made a Lego rotary engine :)

[awesomeaustinv]

The geometry isn't perfect, but it's about as close as you can get at this scale I think. This was inspired by the YouTuber "Gray Gears," who showed a similar engine in his Lego RX7 model. My engine is similar in design to his, but I couldn't see exactly how he put it together, so mine might be a bit different. It does work smoothly enough that it could be driven by the wheels of a larger model without causing too much resistance.

[jminer]

That is very cool - thanks for sharing! I love lego but never really got into mechanical builds, your posts make me want to do that.

[MisterButtercup]

That's awesome!! I'll have to show my son, who is very into building mechanical lego things.

[Chariotoflove]

@awesomeaustinv
Neato!

[WhoIsTheLeader]

@awesomeaustinv That's fantastic. Seems like it might need a good bit of extra machinery to actually work so it might be difficult to incorporate into a vehicle.

It even makes a vaguely appropriate sound!

[MisterButtercup]

Showed my son, who was super excited and now wants to learn about rotaries.

[awesomeaustinv]

@whoistheleader It would have to be a fake model engine, like the fake piston engines in Technic sets, except a rotary. Still the perfect thing for Lego RX7s and rotary Ladas and whatnot!

[awesomeaustinv]

@misterbuttercup He has seen the light! Rotaries are awesome.

[awesomeaustinv]

@jminer Pretty much everything I learned about engineering, I learned from tinkering with Lego. It's so much fun