My brother-in-law posted this link LiquidPiston unveils 40-bhp X2 rotary engine with 75 percent thermal efficiency of a new concept (?) motor on his facebook page... his mind must have gotten focused on my new rotor tattoo that I was showing off at a family friend's son's first birthday (see below). Another rotary fact of yesterday: ditched the party for a bit to break my driving an FD cherry since my buddy brought his new (to him) LHD FD...

Awesome day! LOL

 

Crazy tattoo

 

I would have made it straighter.(rotor tip into middle of cross up top)
Oh,I know a girl that will braid your back hair for a six pack!..want her #?..lol!

 

That's actually a really old take on the engine. It was one of the geometries originally explored.

 

^Did anyone ever explain why the trochoid shape worked better back then, as opposed to why this geometry is claiming to be better now?