tommayer wrote:

Paul,

    following the PSRU ratio debate with fascination.  Likely has no

bearing

on fixed pitch wooden props for small homebuilts, but just in case, the
radials used on airplanes like Staggerwing Beeches and Spartan Execs or
Beech 18 or Lockheed 12s, all of which were as fast or faster than most

RVs,

were  long and longer, and turned 2300 max, cruised between 1700 rpm and
2000.  They were C/S, of course, but in favor of your theory I can assure
you it is perfectly feasible to take a  loaded Beech 17 off  at cruise RPM
and MP as quickly as a C-210 wound tight.  Sounds to me the second you get
your affordable C/S up and running the 2:17 PRSU will be obsolete.Tom

Mayer

Yes and we will enjoy the benefits of at least 20-30 more HP normally
aspirated.

I think we can do it now with the fixed pitch wood prop. Who needs 500 feet
takeoff distance? Won't 1000 feet work in 95% of the cases?

Paul Lamar

"Bass, Jerry" wrote:

Lonnie Prince answered my question about the Max Rpm of a 68" diameter prop.
He says 3089 with his P Tip.  That would make my engine turn 8800 rpm.  I
was getting 7200 yesterday on my 68x 76"

Jerry Bass

Jerry please use a stop watch and time your takeoff for me. Or tell me how
many feet it takes.

Paul Lamar
 
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