flyrotary@lancaironline.net Mailing List Archive

Richard,

We seem to be singing from the same sheet of music in regard to projected HP at RPM, at optimum performance. So what weight have you got on that flywheel, it seems to be a cut down manual cast flywheel from a past photo. I figured I might need a heavier flywheel than the flexplate and was considering having one of those aftermarket steel ones made and have mounting holes included to suite what ever damper I incorporate.

BTW this is single rotor specific if anyone was confused.

George (down under)

Hi Bob,

I am not flying the PP engine yet, however I have a lot of running time on the test stand. My engine is a single rotor with a 12A rotor and rotor housing.

The latest tests showed a calculated power of 92hp at 6000RPM, which, extrapolated to a 13B would give you close to 300hp @ 7500RPM.

Don't expect it to idle smooth much below 2000RPM. I am using a substantial flywheel for preventing gear rattling at that RPM.

This engine has been running now, as it is, for about 6years on the test stand without any engine related problems. It is ready to go in the airplane.

Compared to the 100hp SOOB I have been running in the airplane for 10 years, using the same prop, it is producing at least some more power.

If I had the size airplane for a 13B it would definitely be PP.

FWIW.

Richard Sohn
N2071U

----- Original Message -----

From: Rogers, Bob J.

To: Rotary motors in aircraft

Sent: Friday, June 18, 2010 11:56 AM

Subject: [FlyRotary] Peripheral Port 13B Rotary Engine

Is anyone flying with a Mazda 13B peripheral port engine? If so, how is it working? Can you describe the advantages and disadvantages?

Thanks,

Bob Rogers