Gentle persons:

I've admired the brushless DC motors used in radio-controlled aircraft 
for some time. Their power and torque per size and weight 
characteristics are mindboggling (and a testament to the evolution of 
magnetic material in the last ten years) but I worry about their ability 
to run in our applications without frying themselves.

In a model airplane they typically run for 5-10 minutes and have tons of 
aircooling. Can they run all day in a CNC-mill? If they weren't so 
expensive I'd buy several and strap them to an instrumented testbed. As 
Ben Franklin wrote "experience is an expensive teacher" and I'd rather 
someone else make the investment :-)

Regards,
Kent


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