Hi Paul,

I started to fly my RV-7A, even with the help you provided, It took 9 years
and 4 months and I still have finish work to do, Probably a year worth of
work.

I have one major issue with the propeller:
Wood prop D = 76 in, Pitch = 88 in, Static RPM = 5700

No increase in RPM with speed increase,
Take off takes over 1500 feet
Top speed 105 mph

I tried a Wood prop D = 69, P = 56, Static RPM over 7300 Could not fly it
because of vibration.

What would you suggest?

Thanks,

JP


Assuming you have a 2.85:1 gear box cut 4 inches off the first wood prop
diameter and rebalanced it.

Balance the second wood prop and try it again.

Pass a round bar through the hub and use horizontal and parallel steel bars
to static balance it.

Take some pictures of the intake manifold and email them to me.

Put the word "PRIVATE" in the email subject box if you don't want me to
publish them.

Paul Lamar

Thanks a lot Paul, I will send you a full set of pictures sometimes this
week,
and you can publish if you feel it may help others.
PS:  I do have a 2.85:1 gear box from Tracy
JP



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