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Title: What do motor number specify? Post by: vishalrao on November 28, 2011, 11:48:06 AM I was looking at one plane model that requires a Brushless motor 2212/10 1400kv. Now what does 2212/10 specify? Will any motor with 1400kv fit it?
Title: Re: What do motor number specify? Post by: rcforall on November 28, 2011, 02:53:34 PM Motors are specified either by the stator dimensions or by the bell dimensions ie internal dimension or outer dimension .
So 2212 means internal dimension : Dia 22 mm and height : 12 mm The same motor is also called 2826 by some companies these dimensions are outer : Dia : 28 mm height : 26 mm ( these are the moving bells out dimensions in the case of out runner ) 1400 kv = 1400 rpm/volt so for purpose of calculation we assume you use a 10 v battery the RPM the motor will run at is 14,000 ( in theory ) . Sai Title: Re: What do motor number specify? Post by: vishalrao on November 28, 2011, 03:25:20 PM Thank you Sai! That helped a lot.
What do 10 specify in the above example? Title: Re: What do motor number specify? Post by: Jatayu on November 28, 2011, 04:35:32 PM 10 specifies the number of poles the motors has i.e, Higher the number of poles, lesser your RPM is and Higher the torque so it can spin a larger propeller and give you more thrust.
Assume you have 2210/6 this means that the RPM is more, also the torque is less, it spins a smaller diameter propeller giving you speed. Title: Re: What do motor number specify? Post by: vishalrao on November 28, 2011, 04:41:54 PM Thanks Jatayu!
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