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Old 10-20-2009 | 10:16 AM
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From: lake peekskill, NY
Default pinion

I am using a 10 tooth motor pinion with a 140 tooth main gear, I will be putting the 10T pinion motor in another
heli that has a 150T main gear. My question is what tooth should I change my pinion gear to?
Old 10-20-2009 | 11:15 AM
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From: Spuzum, BC, CANADA
Default RE: pinion

That depends on the KV of the motor, the voltage of the battery packs to be used and the rotor speed that you want.
Old 10-21-2009 | 01:26 AM
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From: Spuzum, BC, CANADA
Default RE: pinion

Here you will find a good spreadsheet application for such calculations:

http://www.rcgroups.com/forums/showthread.php?t=232166

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