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« on: November 03, 2014, 05:03:30 PM »
Aby.Joseph
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Hi,
I am new to this forum. I was looking to build an RC car. I have made a rough sketch of the same and was deciding on the various cost involved.

The main part that confuses me is in the selection of motors. I find a lot of guides on how to choose brushless motors for quads, planes and all. I would be glad if anyone could please guide on what kV rating motor am I supposed to choose for the RC Car. I understand that I would need a lower kV (High torque, low speed) but any numbers would be better.

Thanks in advance.
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« Reply #1 on: November 20, 2014, 09:26:29 PM »
wings_of_fire
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The main issue with your problem is determining rpm and torque, the drive train can handle. Lot of more questions need to be answered to get an optimum solution. Some are 1] total weight of car 2]Max tire rpm 3] Max speed of car 4] Low end speed.
I would suggest, get your car within average specifications of already built production cars. That will give your build an approximation of the right components that are needed.
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« Reply #2 on: November 20, 2014, 10:54:06 PM »
Aby.Joseph
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Thanks a lot for ur time Wings_of_Fire...! I posted this question nearly 17 days and was really surprised why no one replied despite the counter showing it got 800+ hits..!!

And as you mentioned, determining the torque and rpm is main problem. The weight, top speed, accleration required are all variables but any way of determining the torque/rpm/power with formulae..?

A little math would have helped me a lot. Buying a 980kV(low rpm & high torque), testing it... burning it.. then another choice... all doesn't seem the right choice...
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« Reply #3 on: November 21, 2014, 11:23:34 AM »
lastRites
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Anjan Babu is your man. Send him a pm. Post a picture of your motor..
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It is the pervading law of all things organic and inorganic,
Of all things physical and metaphysical,
Of all things human and all things super-human,
Of all true manifestations of the head,
Of the heart, of the soul,
That the life is recognizable in its expression,
That form ever follows function. This is the law.
 

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« Reply #4 on: November 21, 2014, 11:24:40 AM »
lastRites
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One of his builds:
http://www.rcindia.org/cars/%28build-log%29-3-wheeled-rc-car-sweepstakes-2014/
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It is the pervading law of all things organic and inorganic,
Of all things physical and metaphysical,
Of all things human and all things super-human,
Of all true manifestations of the head,
Of the heart, of the soul,
That the life is recognizable in its expression,
That form ever follows function. This is the law.
 

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« Reply #5 on: November 22, 2014, 07:00:16 PM »
Aby.Joseph
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I did go thru his post... nd a good build...!!  Thans for the suggestion.. will surely keep updated about the progress of my model...
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