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BrianG · 06.21.2007, 10:05 PM

When you go with higher voltage, you can choose a motor with a lower kv/higher wind count, which will help runtime. Also, less current is used to get X amount of power so any current losses are less as well.

You generally shoot for 35k rpm as the max motor rpm. To pick a suitable motor, just take 35000 and divide by the voltage. That will give you the motor kv to get. Then, just find a motor with a kv in that range.

Runtime increases by going to 8Ah from 5Ah depends on what you are getting now. Assuming you are using the same motor and gearing and voltage: If you get say, 30 minutes on the 5Ah, 8Ah will give you 48 minutes theoretically.

	(#2)
BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	06.21.2007, 10:05 PM When you go with higher voltage, you can choose a motor with a lower kv/higher wind count, which will help runtime. Also, less current is used to get X amount of power so any current losses are less as well. You generally shoot for 35k rpm as the max motor rpm. To pick a suitable motor, just take 35000 and divide by the voltage. That will give you the motor kv to get. Then, just find a motor with a kv in that range. Runtime increases by going to 8Ah from 5Ah depends on what you are getting now. Assuming you are using the same motor and gearing and voltage: If you get say, 30 minutes on the 5Ah, 8Ah will give you 48 minutes theoretically.