It looks like the rotor design is quite different -- much more rounded and oblong, as opposed to triangular, with the combustion happening inside the rotor. Th

It looks like the rotor design is quite different -- much more rounded and oblong, as opposed to triangular, with the combustion happening inside the rotor. That's actually quite clever -- increase the capacity, without increasing the size. The new piston design looks to have a much larger sealing area against the walls of the block, and the lack of distinct edges -- the ever-so-fragile apex seals -- should increase longevity, although IANAME, so have your salt-shaker ready for action. These look fairly simple to build as well.