|MadSci Network: Engineering|
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.
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