Hello Paul,

My spelling is terrible, it is Aixro.  So far the 300 cc is all that is available.  The R301 means single rotor.  We have been discussing a R302 engine (twin rotor).  The problem is that at 6000 RPM the output is not enough for LSA at 70-75 hp. (kart engines run up to 9000 rpm to get 48 hp) 
Discussions are ongoing, with the SAE paper authored by Wankel ag et. al. also being reviewed. All ideas are welcome.
If turbocompounding were already engineered there would be interest.  As is, just getting a new engine manufactured is using all available assets.  
Dan

What is the matter with running it up to 9,000 RPM for take off and climb out?

All you need is a 3.3:1 gear box. HP is RPM times Torque. The more the RPM the
more the HP. Airplanes fly on HP and not Torque. With gearing Torque can be
almost anything you want it to be. Lets say the engine torque is 50 foot pounds
at 9000 RPM. With a 3.3:1 gear box prop torque would be 165 foot pounds at 2700
RPM. Prop HP is pretty close to being the same.

In the case of the NA Mazda engine Torque is 160 foot pounds. With a 2.85:1 gear
box prop torque is 456 foot pounds. Prop HP is pretty close to being the same.

Paul Lamar ...No rotor no motor.

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