Jerry Hey wrote:

I just got from Craig Catto's with my new prop.  It is a three blade:
68 inch diameter and 80 inch pitch. Originally this prop was intended
for a 200 hp Velocity but was too much prop and he could not spin it,
so Craig took it back and hung it on the wall where it waited for me
to come along.  I got a very good deal.    Craig asked me if I really
believed  the rotary could spin this prop and I replied, with plenty
of bravado,  that it would make a good "climb" prop.   However, when
I bolted it on, a few minutes ago, my confidence was shaken.  Can the
little rotary really  turn this monster?     Jerry

You will have some clues when you get your engine running Jerry.
We can also test it on the dyno for static RPM.

Paul Lamar

Jerry
I hope you are going to use a 2.85 drive. If not send the prop. to me in
Australia. I will put it to good use.
Ian. 72 1/2 inch dia. 81 inch pitch. (1 inch + 2.54 real measure.)

Is that your current prop dia and pitch Ian? You have a two 
blade and Jerry's three blade may have more blade area.

Jerry will have about 200 to 240 HP at 6000 RPM with
a corresponding amount of torque so he may not need
a 2.85:1 PSRU. He is building a peripheral port engine.

Paul Lamar
 
The AirCraft Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2002 All world wide rights reserved.