In rec.aviation.marketplace Gregory Hall wrote:

I wonder if anybody has thought of putting the appropriate dimples on the
surface of propellers? Seems like reducing drag there would increase RPM and
reduce HP required.

While reducing drag would be a goal, fixed propeller systems are designed
to keep the tip velocity under mach 1.

For constant speed props, the RPM is whatever you set it to, again
under mach 1.


--
Jim Pennino

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