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Old 21-11-2017
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Zoea Zoea is offline
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Question Gear- ratio help!

Hi all

I have just built a new car (Abisma AB2.4... !) which has this spec:

Hello,

the internal translation is 2,92
the external translation is 2.78

So I am planning to use (maybe) a 6.5 turn brushless motor. I'm wondering what pinion size is a good choince? I have to mention I think it's a standard 1/10 model, perhaps a little big for 1/10 but not much..
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Old 01-12-2017
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Any help folks? I have a wide variety of 48dot pitch pinion s to choose from ..
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Old 01-12-2017
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these appear to be available on the web in wither brushless or brushed versions

brushed is a 15t
brushless is 3300 kv not sure what that equates to in "turns"

brushless version runs a 23t pinion be wary as they may be .6 pitch module not 48 dp it may not mesh correctly


regards
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Old 01-12-2017
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THANKs. Amazing.

So it seems 13.5 turn is (*very roughly!) equiv to 3300kv. So with a 6.5 I would want something say 14-16 tooth?

I believe the spur is 48dp but I shall double this
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Old 01-12-2017
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these are more for fun than hardcore racing I wouldn't but as fast motor in as a 6.5 to start with

it may destroy transmission

regards dave
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Old 01-12-2017
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Ok cool thank youi

I believe the motor is already fitted but I will rethink my position when I get home. I have quite a few 540 brushless to choose from. Shouldn't be a problem.

Just wish I could get a breakdown of the gear ration / pinion selection maths. I guess I could google hard for it.
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