Paul wrote:

Perry,
There is a simple test you can perform to see if your prop
tips are running into the mach brick wall.

Dive the airplane and watch the tach. If the RPM increases
you are merely HP limited by too much pitch. If not your
tips are up there near the mach barrier for the airfoil used.

Perry Mick wrote:

I'll do that.  This might explain why I have such a narrow RPM
range compared to a prop.  Also means if it's fixed (reshaped
tips) I can go faster with what I've got.


Perry J. Mick
Mick Duckt N7XR
http://www.ductedfan.com

 
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