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T-REX 500 › Help with gearing
01-23-2010 02:35 AM  8 years agoPost 1
Aces

rrApprentice

Georgetown Tx

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Can someone check me here. I did the head speed calculator at readyheli and I need verification. I am wanting 2900 rpm for my trex 500 (governed). I have a main gear of 162, what pinion do I need for this? Can someone give my the formula you use? Thanks.

Did he crash? Dang, I missed it!

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01-23-2010 02:53 AM  8 years agoPost 2
FlaG8r

rrElite Veteran

Florida

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why not buy an optical tach? I would guess a 16T.

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01-23-2010 03:26 AM  8 years agoPost 3
rocco.sj

rrVeteran

California,

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If everything is stock,i would run the 14 pinion and throttle curve at 95% flat. which gives you around that headspeed range you are look for.6s 35c 2600mah lipo packs.

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