RC India

General Topics => Beginners Zone => Topic started by: vishalrao on November 28, 2011, 11:48:06 AM



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!