Mike Wills wrote:

  For all you guys currently flying, particularly RV guys with 2.17:1 PSRU
ratios. I'm getting ready to order a prop and the manufacturers are asking
questions about desired prop RPMs at various performance points. Before
responding with uneducated guesses I thought I'd ask the group for their
numbers. Could you all please respond with the following:

1) Max RPM

6500, and it's not something I do a lot.

2) Max Cruise RPM

5500

3) Economy Cruise RPM

5100

4) Static RPM

6200 @ 12 psig boost

-GR

Greg Richter can usually be found in the North Carolina mountains searching
for wild mushrooms, honey trees or small hydroelectric sites.  Emails are
best served with an old Madeira or Armagnac which greatly increases the
chance of a speedy or useful reply.

Cozy N722 -- Mazda 13B
Turbo  http://bluemtn.com/greg  -or-  http://bluemountainavionics.com

6200 RPM at 12 psig boost!! Very impressive for a 2.17:1 PSRU Greg.
Sounds like you need more pitch or blade width or both.

Paul Lamar
 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.
ACRE NL web site.
http://home.earthlink.net/~rotaryeng/            http://www.linux.org