It is most likely that a portion of your prop was stalled at static in

both cases,

and also that the increase in rpm is an indication of more power, but

probably not

directly rpm squared since more of the prop was probably stalled in

the second

case. It also sounds like your prop is too small in one dimension or

another.

Vance

Vance means blade width or diameter I think.

Paul Lamar

I agree Vance.  Tracy Crook and I have the same make/same dimensional prop.
As Tracy recently commented, what use to be his cruise prop with a lower HP
engine became his climb/cruise prop with the higher HP engine.  A Prop
program I have indicates I would now need around 75 -76 " pitch vice the 72"
I now have to exceed 200 MPH at engine rpm of 6350..

Ed

 
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