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wzak29





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PostSubject: pinion   pinion I_icon_minitimeTue Oct 20, 2009 12:19 pm

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?
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jstarks

jstarks



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PostSubject: Re: pinion   pinion I_icon_minitimeTue Oct 20, 2009 12:30 pm

None will get you the exact same gear ratio.

140T main / 10T pinion = 14:1 gear ratio

150T main / 9T pinion = 16.6:1
150T main / 10T pinion = 15:1
150T main / 11T pinion = 13.6:1

So you see, you can either get a little under or a little more over, but you cant get it exactly the same.

The 11T pinion will be the closest to the ratio you had. orange74

Hope that helps.
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