[newgeezer]

Interesting stuff. Reminds me of the excitement generated by the Wankel back in the day, before the first Arab Oil Crisis.

Then, one of the Wankel’s biggest shortcomings turned out to be its relatively-poor MPG.

And, since this article doesn’t tout the Duke Axial Engine’s fuel efficiency, I’m guessing it’ll go nowhere in today’s (Nanny State skewed) marketplace... unless those promised “future developments” bear substantial fruit.

[DungeonMaster]

Then, one of the Wankel’s biggest shortcomings turned out to be its relatively-poor MPG.

Yes, I was wondering about efficiency and how well it would scale up. I miss piston powered airplanes. I also wondered about durability, of course.