That is true, but if I was going to go with something else, I would try to
find something that will turn my prop close to the 2700 that most props are
designed for.  That means that I would look for something in the 2.2-2.4
ratio range, not 3.17.  That ratio will mean your prop will never get more
than 2000 rpm with the rotary.

Bill B

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Ernest Christley
Sent: Wednesday, December 21, 2011 2:26 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: off topic, propeller carving and paint

Bill Bradburry wrote:
> Tracy's PSRU ratio is either 2.17 turning backwards (A,B) or 2.85
> turning forward (C) I think??
>
>  

And it is a good product; but, it's not the only PSRU in the world.


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