XRAY - Model racing cars
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Pinion Gear size
http://forum.teamxray.com/viewtopic.php?f=8&t=27325
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Author:  Fireblade [ Mon Nov 19, 2018 19:40:04 ]
Post subject:  Pinion Gear size

What pinion gear are you guys running with a stock 84 tooth 48 pitch spur. I am looking to get a 13.5 and a 17.5 540 motors?

Author:  MILAN [ Mon Nov 19, 2018 22:37:54 ]
Post subject:  Re: Pinion Gear size

it all depends on the race rules and if it's blinky mode
This is the mostly used gear ration that i know in blinky classes
with 13.5T motors - indoor 5.0 gear ratio and outdoor 4.5 gear ratio
with 17.5T motos - indoor 4.5 gear ratio and out door 4.0 gear ratio

You need to calculate the gear ratio:
(spur gear : pinion) x 1.9 = gear ratio

example:
(84 : 32) x 1.9 = 4,99

[1.9 is the inner ration in T4]

Author:  Fireblade [ Wed Nov 21, 2018 04:29:05 ]
Post subject:  Re: Pinion Gear size

Thanks MILAN

Author:  Ruth47 [ Tue Jun 04, 2019 12:01:50 ]
Post subject:  Re: Pinion Gear size

MILAN wrote:
it all depends on the race rules and if it's blinky mode
This is the mostly used gear ration that i know in blinky classes
with 13.5T motors - indoor 5.0 gear ratio and outdoor 4.5 gear ratio
with 17.5T motos - indoor 4.5 gear ratio and out door 4.0 gear ratio

You need to calculate the gear ratio:
(spur gear : pinion) x 1.9 = gear ratio

example:
(84 : 32) x 1.9 = 4,99 vidmate´╗┐

[1.9 is the inner ration in T4]


Nice, that worked like a charm :)

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