<< My guess is that props are made to turn at about 3000 RPM max because 50
 > years ago that was about the max that a Lycont could turn. >>

The tip speed of the prop must be kept below the speed of sound. A single
blade is the most efficient. The more blades the less efficient. Big props
must be turned slower. When the maximum diameter is reached in a design and
more power is added, then additional blades must be added.
Lynn E. Hanover

 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.

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