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electric motor resistance

Old 03-10-2016, 01:47 PM
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Default electric motor resistance

Hello...spring has come to Pennsylvania...I'm building a HK Bushmaster, I notice when the battery is not connected to the ESC the prop turns with some resistance. When I connect the battery, throttle all the way down and Tactic TTX650 bound and turned on I turn the prop (carefully of course) and notice considerably less resistance turning it. What's up? BTW everything works, parts all fit, I'm just going slowly with the cosmetic aspect of the plane, trying to be meticulous. A buddy got one, we're looking forward to fly them. I'm new to electrics, thanks for the help in the past! BTW how much flaps should I dial in?

Bill in Pa.
Old 03-10-2016, 04:17 PM
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Many ESC's do just that, Castle Creations in particular.
What you're feeling is the ESC putting a short across the motor windings as if the brake were on. There's nothing wrong with your motor or ESC. When I got my first BL outrunner about 10 years ago and was using a CC T-bird ESC, I ran in to this phenomenon and thought the bearings were bad, took the motor apart to lube them before I stumbled on what was going on

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