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Old Jul 12, 2012, 02:09 PM
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United States, OH, Eaton
Joined May 2006
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Quote:
Originally Posted by mvaller00 View Post
So quick question (if you don't mind).... it's a 1650kv motor, why so little thrust where other motors with less or similar kv put out more thrust? Just a bit confused?
I'll try to find a link later but the kv rating of a motor is rpm per volt with no load. When you load the motor with a prop a bigger motor will be able to turn it faster, drawing more power and delivering more thrust. The kv rating is good for comparing motors of the same size. If 2 motors are the same size and type with different kv ratings, the lower one will deliver more thrust while the higher one will give more speed. You can think of it like gears in a car to an extent. As a matter of fact, a gearbox can make different kv motors nearly equal but it's usually not practical for our small planes. Maybe this will help.

http://www.brushlessrcmotor.com/brus...motor-ratings/
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