What impact do turns have on a motor

[Erfolg]

What is the importance of the number of turns on a motors performance?

 

For example a 7 as to a 9 or 10 turn motor?

 

 

[PatMc]

Torque of a motor is proportional to ampere turns - i.e. If all other dimensions are equal then when drawing the same current a 7 turn motor will have 70% of the torque of a 10 turn motor.

[Simon Chaddock]

The problem is that most plane brushless motors are so tightly packed inside that to increase the number of turns you have to use a slightly thinner wire which reduces the maximum amps that it can handle. The result is that for a slightly lower amp figure the motor can produce at least the same torque but at lower revs.

Finding the best motor for a particular plane can involve a making a choice from quite a number of variables.  

[Paul De Tourtoulon]

That used to be important on 1/10 scale electric cars with brushed motors, the less turns the faster they went and the more electric they used.

 

Brushless motors should be selected on the wattage ( power ) and the KV, the number of rpm per volt to give the speed that you need with a given prop.