Differences between inrunner and outrunner motors? - RC Groups
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Mar 23, 2012, 12:10 PM
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Differences between inrunner and outrunner motors?

Could anyone give some differences between inrunner and outrunner motors?

Thanks a lot!
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Mar 23, 2012, 12:24 PM
Wake up, feel pulse, be happy!
Piece's Avatar
Inrunners: Magnets on the inside mounted directly to the shaft; winding coils and stator are mounted to the inside of the can and surround the magnets. Can is stationary.

Outrunners: Winding coils and stator are inside fixed to the bearing tube; magnets are placed in a rotating can that spins around the windings.

Outrunners tend to have lower Kv and higher Kt values for a given motor size and are more commonly used for directly driving props, whereas inrunners are usually used with gearboxes or in high-speed applications running a small, direct-drive prop.
Mar 24, 2012, 02:58 PM
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Thanks C4H10, that help a lot!
Mar 24, 2012, 08:48 PM
homo ludens modellisticus
Ron van Sommeren's Avatar
Search for discussions with inrunner AND outrunner in de title, or inrunners AND outrunners.

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