Quote:
Normally, the axle would rotate at 80rpm at minimum and with pitch control of the blades, you'd get your propulsion from changing pitch in those conditions where the 80rpm and little pitch was enough for you. When exceeding these limitations, the axle rpm would be increased to max 200 or so.
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Ahhhhh so more like a variable pitch prop on an aircraft! Well that was an obvious answer I should have picked up right away.