[M.D. Holloway]

Looks like a 4 lobe Wankel to me - maybe a cross between a Scotch Yoke and a Wankel, then again I'm not a mech eng. One thing that I see right off the bat is the lubrication issues. The wipe is gonna spell trouble. Maybe they could go with ceramics or something.

Wouldn't the efficency be questionable due to the high air exhaust temp presenting right to the intake? (at least thats what it looks like would happen in the pic). Looks like pre-detonation will be a bugger. I think some after coolers would be needed no?

As for use as a Stirling, doesn't a Stirling have a 10-20X displacement stroke compared to its power stroke? That doesn't look right.

Again, I'm no mech eng so educate me please.