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As you increase pitch the the prop will also slow down. So if you have a 44" prop that is spinning too fast then increase the pitch until it slows down.
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SteveC68 wrote:
As you increase pitch the the prop will also slow down. So if you have a 44" prop that is spinning too fast then increase the pitch until it slows down.
Not so simple, increasing the pitch also affects climb rate. A 27 deg prop will climb well, but have a low top speed. A 42 deg prop will climb poorly, but have a high top speed.
It's all compromise. That's why variable speed props came into being. Check out the Ivoprop.
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Increasing pitch WILL decrease RPM keeping diameter constant. Conversely I could decrease pitch to like 5" and the engine will make tons of thrust but never get off the ground.
Also pitch isn't measured in degrees it's inches. A 42" pitch prop moves the propeller forward 42" for 1 revolution in ideal conditions. If it were measured in degrees then a 44" diameter prop that was 42 degrees "pitch" would have a different pitch speed than a 54" diameter prop that was 42 degrees "pitch" at the same RPM. That's not the case.
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