Old 01-25-2010, 08:34 AM
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Join Date: Aug 2005
Location: NY, USA
Posts: 5,850

Assuming you have a reasonable prop on the motors, each speed 400 should draw between 10 and 13 amps, so a 30 amp ESC should work.

It would be best to put a wattmeter on the set-up to confirm, but I think you will be fine.
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