MAC hub motor: How does it sound when the clutch is slipping?

Joined
Jul 19, 2019
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My new MAC hub motor works like a charm when under light load, it uses low current and should not be a hall/phase lead combo issue.
My question is what kind of sound comes from the clutch if it is failing? Is it silent or does it make a squeeking sound?

Here is the sound when adding just a little throttle, is this a clutch issue or something else?

http://www.torestabell.no/mac_clutch2.mp4

Reaches top speed, uses maybe 200 watts when riding fast on a flat road. But can not take more than about 400 watts before the sound can be heared and the motor is no longer driving the wheel.

Thanks,
Tore, Norway
 
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