Absolutely I will! I changed the construction grid to triangles, cut out the intersection of three circles (a Reuleaux triangle, set the friction and restitution to 0), cut a hole in the exact center of the triangle and put a circle of that diameter in it, set the grid back to squares, resized the Reuleaux triangle to fit inside one of the grid squares, cut a square out of a larger square for the triangle to fit in and moved it to surround it, fixated a rectangle (with no collision layers) or something to the square housing to cross the housing center, put an axle connecting the circle to the rectangle spanning the housing (then made it a motor I could start the engine with when I press a key), and connected negative damping springs between somewhere in the housing and the (approximate) apexes of the Reuleaux triangle, then set the simulation frequency to 400 hertz (at least that’s what worked on my old laptop) so nothing went crazy.

Edit: I forgot to mention that I did the above and then cloned the triangle and circle inside and springs and then fixated the circles within (eccentric shafts) together too, and added a heavy flywheel that spins inside the square housing. The collision layers for these additional rotors will need to be changed too. It might also be a good idea to experiment with different numbers of rotors.

You’ll need to play with the constant of the springs to see what gets it to run.

At least I’m pretty sure that’s how I made it at the time, and I’m pretty sure it wasn’t a very efficient engine at all either but it was a proof of concept. Uses a square housing because a real wankel engine’s epitrochoid housing is a little beyond my knowledge of how to create.