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skellyo
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04.15.2009, 10:16 AM

What you need to do is take the diff ratio and multiply it by your spur:pinion ratio. Truggies are direct drive, so there is no transmission gear ratio involved.

For instance:

Diff Ratio: 43:13
Spur/Pinion: 62:13

Total gear ratio is = 43/13 * 62/13 = 15.775:1
1 revolution of the tires = 15.775 revolutions of the motor
   
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superek4
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04.15.2009, 10:45 AM

Quote:
Originally Posted by skellyo View Post
What you need to do is take the diff ratio and multiply it by your spur:pinion ratio. Truggies are direct drive, so there is no transmission gear ratio involved.

For instance:

Diff Ratio: 43:13
Spur/Pinion: 62:13

Total gear ratio is = 43/13 * 62/13 = 15.775:1
1 revolution of the tires = 15.775 revolutions of the motor
How abt 46/11x 43/13=13.53?

Or 50/11x43/13=15.01 or

50/11x45/10=20

Which is best final gear ratio?
How's this final gear ratio?

Will my esc n motor be too hot?


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Last edited by superek4; 04.15.2009 at 10:52 AM.
   
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skellyo
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04.15.2009, 10:51 AM

Quote:
Originally Posted by superek4 View Post
How abt 46/11x 43/13=13.53? How's this final gear ratio?

Will my esc n motor be too hot?
Depends on the motor, voltage and tires.
   
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skellyo
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04.15.2009, 12:11 PM

Quote:
Originally Posted by superek4 View Post
Can I assume the more revolutions the hotter the motor?
No, not really. It depends primarily on the load of the motor.

A 36-70-1600 on 4S with 13:46 gearing should do ok. Likewise, 6S on that motor should do ok with that gearing too. The gearing on 4S puts you around 34mph and on 6S puts you around 50mph.
   
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superek4
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04.15.2009, 12:37 PM

Quote:
Originally Posted by skellyo View Post
No, not really. It depends primarily on the load of the motor.

A 36-70-1600 on 4S with 13:46 gearing should do ok. Likewise, 6S on that motor should do ok with that gearing too. The gearing on 4S puts you around 34mph and on 6S puts you around 50mph.
nice, how do u calculate the speed for 13.46 gearing? I need the speed for 15.01 gearing


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