Just in time for it's own demise?
I liked the bit about the piston stroke profile being changable by design of the cam profile.
Like a rotary engine, this is something that can be argued to death and explained away, even while someone makes it work!
In the long run, it may not matter. I just read about the Electra-flyer in the latest issue of Sport Aviation.
1.5 hours of flight for a 70 cent charge! Electric flight might be the ticket, and that Kill-a-whatchamacallit drag bike with Dewalt battery technology sure is fast! The batteries and motors / controllers keep getting better. When they are lighter than an engine with tank-o-gas, they win.....if the recharge does not take too long.......and the batteries last 2000 hours before replacement.