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Jobu 06-18-2004 09:16 PM

propellers
 
Can anyone tell me the best rule of thumb for props?
As far as what is typically the best way to change performance, I assume the more pitch the more speed but less acceleration.

Matt Kirsch 06-21-2004 08:09 AM

RE: propellers
 
The best rule is to not put your thumb anywhere near the prop, especially when it's spinning :)

Generally speaking: Increasing diameter increases thrust. Increasing pitch increases speed.

This whole electric power system thing is a balancing act. It's the same with glow, but with 50+ years of experience, it's not nearly as experimental in nature. An electric motor and battery can turn a very narrow range of propellers while still achieving peak performance. Get too much pitch or too much diameter, and you burn something out. So, be careful.

Electric corollary: Increasing diameter or pitch increases Amps.

To keep the Amps from getting out of hand, when you increase one, you need to decrease the other. Add an inch of pitch? Take out an inch of diameter, UNLESS you have a Whattmeter and/or know that the increase won't exceed any rated capacities.

Jobu 07-01-2004 02:10 PM

RE: propellers
 
Thanks Matt

Bret1 07-01-2004 05:05 PM

RE: propellers
 

ORIGINAL: Matt Kirsch
To keep the Amps from getting out of hand, when you increase one, you need to decrease the other. Add an inch of pitch? Take out an inch of diameter, UNLESS you have a Whattmeter and/or know that the increase won't exceed any rated capacities.
No worries, just buy a bigger motor and ESC to go with that bigger prop! :D


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