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Question About Cooling motors

R/C Submarine modelers

Postby RickNelson » Tue Sep 01, 2009 4:01 pm

The batteries have to be running in series to get 12v:

------- Neg Battery + ----------Neg Battery + ---------

------- 6v ----- ------- 6v --------

-------------------------- 12v -------------------------------
Rick Nelson

Qualified in Submarines 1965
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Postby Ramius-II » Sun Oct 04, 2009 11:41 am

Hi All! :D
It has taken me a bit of time to be able to add to your discussion. One of the other possible contributing factors is the size of the wires going to the motor. Unlike AC, DC goes through the entire cross section of the wire. If you use small gauge wires (20 ga. or less) then the wires will act as a resistors reducing both the voltage and the current available at the motor. To really tell what amount of pure "power" is available to the motor you would have to measure the voltage at the motor terminals while the motor is running by adding a temporary set of test wire for your meter. Typically, the power wires to a drive motor should not be less than 18 ga. In addition, it is helpful for the reduction of noise created by the sparks of the brushes to take and place the wires in an electric drill and twist them together. This also makes routing the wires easier. If you are really stuck with solving the motor heating problem then you may wish to send an e-mail to the guys at M.A.CK. motors this link will show you their motors. ( What I think makes them a good choice is the higher standards and level of internal construction in their motors. Hope this helps.

Best, Ed
Just one more wire!
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