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Old 02-04-2006, 02:37 AM   #1
B Hosticka
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Default Relation between Diameter, Pitch, RPM, and HP

Is there a standard formula for relating the Diameter, Pitch, RPM, and HP for a propeller? The best case would be to know RPM, HP, assume a Diameter and calculate a pitch. But any formula with these four variable will do since a little algebra can isolve for the unknown (1) parameter.

I guess that an efficiency would have to be assumed for this. Of course the number of blades is specified also. Lets say two.

Also what is done to make a test club instead of a propeller. HP and RPM would have to be the same as a real propeller but diameter would be smaller and thrust is a disadvantage. Low efficiency?

SO many questions.
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