Wankel engine

We had to design a scooter as a project in school. I had to design the engine. This is what I came up with. It's pretty basic. The housing inner surface has been modeled with an equation driven curve. The rotor, for some reason, still intersects with it at some points. Not sure why, couldn't really figure out the problem. I didn't have the time to research the lubrication technology, as it was pretty much last-minute, so I decided not to implement it at all. Will get to it at some point though.