RC-Monster Forums - View Single Post - Picking the right motor for the right application

BrianG · 11.07.2006, 10:59 PM

IMO, the size of the motor depends on the weight of the truck. If the motor is too big/powerfull, it's a waste of money. Kinda like putting a 1,000HP motor in a mid-size car; it's nice and all, but not very practical unless you can actually use it. Likewise, putting a 50HP motor in a mid-size car is not practical either because it is underpowered.

Plus, using a motor too big doesn't load it enough. Using a motor that's too small loads it too much. Some of this can be compensated with via gearing to a point.

The wind of the motor depends on the voltage used. Obviously, for a very large motor, you want to use higher voltage to produce the current needed for the HP.

From what experience I've had (and that's not really all that much). Using a high wind (low KV) motor geared really high is not ideal. Nor is using an unreasonably low wind (high KV) geared really low. In either case, some or all parts gets too hot and efficiency falls. It seems moderation works best.

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BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	11.07.2006, 10:59 PM IMO, the size of the motor depends on the weight of the truck. If the motor is too big/powerfull, it's a waste of money. Kinda like putting a 1,000HP motor in a mid-size car; it's nice and all, but not very practical unless you can actually use it. Likewise, putting a 50HP motor in a mid-size car is not practical either because it is underpowered. Plus, using a motor too big doesn't load it enough. Using a motor that's too small loads it too much. Some of this can be compensated with via gearing to a point. The wind of the motor depends on the voltage used. Obviously, for a very large motor, you want to use higher voltage to produce the current needed for the HP. From what experience I've had (and that's not really all that much). Using a high wind (low KV) motor geared really high is not ideal. Nor is using an unreasonably low wind (high KV) geared really low. In either case, some or all parts gets too hot and efficiency falls. It seems moderation works best.