Re: How do you compute for the no. of turns of wire in a motor to get the rpm?

Hello Gino: There is no formula I know that relates the number of turns of 
wire to motor rpm and torque. The speed depends also on the number of 
poles, how the motor is wound, the type of magnets used in the armature, 
etc. I collected a number of sites on the Internet that might offer some 
clues to solve your problem:
 http://www.britannica.com/bcom/eb/article/2/0,5716,108542+17+106043,00.html
?query=dc%20motor
 http://www.micromo.com/03application_notes/tutorial1.asp#single
 http://www.aveox.com/primer.html
 http://www.eng.abdn.ac.uk/~eng489/eg2558/topic5c/sld002.htm
 http://www.physics.udel.edu/wwwusers/watson/phys208/motor-off.html

Keeps in mind that motors are designed for a specific speed and might not 
withstand large amount of overspeed. Although this is a 3-volt toy motor, 
29,000 rpm may exceed its structural capacity. Use caution and eye 
protection.
Your MAD.SCI Micro.