I am researching, looking for a suitable Rotary engine for an aircraft.
 I would like to subscribe to your newsletter and also ask if you know
 of a mfg. that makes a rotary engine that weighs 80-100 lbs and delivers
 150+ hp to a propeller turning 2500 rpm.

 Thanks
 Lyn Amestoy

 You have set HP per pound  requirement unrealistically high.
 Is that the bare engine weight with out gear box or the firewall forward weight?
 Wankel rotary engines usually run about .7 HP per pound firewall forward.

With a 3:1 gear box, all aluminum construction and and about 8000 RPM takeoff you
might achieve as much as 1.2 HP per pound.

 Small aircraft piston engines like the O-200 are .5 HP per pound,
 The O-320 is about the same ratio.

 Paul Lamar


Paul,
Rebuilding my single rotor.  All aluminum components. High compression rotor.  P port.  Just waiting for the race balance at Mazdatrix, then final assembly here in Utah.  3.17 Ross drive.  How much Hp might be possible at 8000 rpm, takeoff limitation?

Lewis.

Good work Lewis!! My guess is close to 150 HP.

You lucky dog to have a 3:17 Ross. I would love to have one for the RV4.

Makes sure it has the sun gear thrust bearing mod. Also look into swapping out the 4 pinion planet carrier for a 6 pinion version and use Tracy's torque idolater instead of the spring clutch center. Or find a Porsche unit with rubber bushings. I am not sure that will fit the Ross input shaft spline so check that first.

Paul Lamar