I have just got a bear Hawk with a load of spares. Trying to fit a motor and pinion I discovered that the 13T pinion fitted one gear box but not the other. Looked up the manuals here and found out the Hawk takes 15/17T and the Blitzer 13/15T. I assume, wrongly or rightly, that this alteration was to do with the change of wheel and tyre size. The car came with both blitzer and hawk wheels. I wanted to be able to swap sets of wheels over as the mood takes me.
Will I need the change gear box each time as well?
I ask as currently I have the 13T pinion in the blitzer gearbox but with the smaller hawk wheels. As I work this out a smaller pinion means a larger spur (the casings on both gear boxes are identical) that means the output to the axles will be slower but with more torque. Blitzer wheels have a larger diameter so even though the axle turns more slowly the car will travel further for each turn. The up shot of the current set up is a quick acceleration to a slow top speed!
My thoughts are to run the Hawk gear box with a 17T pinion. Would this work ok with the larger diameter blitzer wheels? I have a technigold in the car at present. Will there be enough torque in the motor to cope with the higher gearing? Also will the motor run ok with this gearing and not over heat? I have read a number of threads on gearing causing motor problems but not quite grasped it yet!
Cheers
Chris
Bear Hawk / Blitzer Gearing
Started by Biggins, Apr 29 2005 09:22 PM
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#4
bholio
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Posted 29 April 2005 - 09:22 PM
quote:
Originally posted by Biggins
Dave
That thread confirms pinion sizes and gear box casings but it is the effect of running the higher geared hawk box with the larger blitzer wheels I'm concerned about
Cheers
Try it out. If the motor/esc/battery get really hot after a few minutes of running, then it doesn't work. You won't secretly break anything. There will be an indication (heat) that your setup is wrong. Check it frequently the first few runs.
You could also just run the 15t pinion which appears to be used in both gearboxes.
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