"Bass, Jerry" wrote:

RV6A  2.85:1 Ross reduction drive which I added a internal thrust plate.
Pix on previous msg.

Jerry Bass

Thanks again Jerry. Now I know why you are getting 7000 RPM. Ought to be

fast.

Paul Lamar

Tracy Crook wrote:

Great climb but Fast?  I haven't seen this ratio go fast on anyones
airplane.  It is almost impossible to find a high speed prop that will work
correctly at the resulting prop rpm.   I have cautioned all who would listen
that this ratio will result in low top end and high engine rpm.

Tracy Crook
tcrook@rotaryaviation.com
www.rotaryaviation.com

Come on Tracy. Theoretically it is not impossible to find a fixed
pitch prop that will make this airplane go faster. Back in 1933 seaplanes
were going 400 MPH with a fixed pitch wood prop. Now the takeoff distance
is another matter :-) The other issue is the shape of the HP curve.
If the HP peaks at 6000 RPM then yes. Obviously it is not peaked
at 6000 RPM because Jerry is climbing out at 7000 RPM.

Further more Butch, Perry, Vance and Bill are on the job and we will soon 
have a low cost variable pitch prop. Hang in there Jerry.

Paul Lamar
 
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