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

From: Al Gietzen

To: Rotary motors in aircraft

Sent: Thursday, July 05, 2007 7:12 PM

Subject: [FlyRotary] OMP flow rate

Does anyone know what the flow rate is from the OMP?

Unfortunately, I don’t know what year the pump is from.  It is on my 20B which has a 12A front cover.  It is a 4-port, likely from a 13B, in which one port has been blocked and the other three go one to each rotor housing.

 

The only data I have on hand is what Richard measured some years ago, running the pump at 6000 rpm.  This could useful if I knew the ratio of pump speed to eccentric shaft speed.

 

Thanks,

 

Al

The OMP drive gear is the same size as the distributor gear. So it runs half as fast as the E-shaft. In my tests I referred to the E-shaft speed.

 

Richard Sohn
N2071U

 

 

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