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Home✈️Aircraft🚁Helicoptere-Elec-Helicopters New or Limited ActivityE-Sky › it seems impossible but its doing it
02-22-2010 08:05 PM  10 years ago
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brettman

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SOUTH DAYTONA FL.. u.s.a.

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it seems impossible but its doing it
my 3900 motor had smoke coming out of it, so i got a new one.I installed it with out being hooked up to esc lash is good when hooked up to esc no battery it drags spinning counter clockwise like auto'ing.now i know its the esc but its not powered up so there shouldn't be a magnetic field unless some capacitor stores energy. yes it's the stock esky esc with about 80 flights on it.I found out by accident thank god.there most be some stored current or its haunted.guess i'll be buying a new non esky esc thanks for listening.

BRETT
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02-22-2010 08:57 PM  10 years ago
Melnic

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Columbia, MD,USA

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A brushless motor will put some drag on the head when your moving it by hand.

Rotate blades CW and the oneway bearing should disengage and not spin the maingear nor the motor.
Rotate the blades CCW and the maingear should engage, turning the motor.
There should be no difference between the motor plugged into the ESC and NOT (I think).
BUT if your ESC is powered up, there will be a difference if braking is turned on depending on the ESC brand.
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02-22-2010 09:50 PM  10 years ago
brettman

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SOUTH DAYTONA FL.. u.s.a.

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HEY MELNIC,YOUR NOT UNDERSTANDING I'LL SPIN IT C/CLOCKWISE IT A SPIN 4 TIMES BEFORE STOPPING CONNECT WIRES FROM MOTOR TO ESC WITHOUT BATTERY EVEN IN THE HELI IT DRAGS AND WOULN'T EVEN SPIN ONE REVOLUTION UNPLUG ANY MOTOR WIRE AND SPINS FREELY AGAIN WITH BATTERY OUT OF AND NOT PLUGGED IN TO POWER ESC.THE ESC IS SHOT CAUSE MOTOR WILL NOT ARM WHEN EVERYTHING AND BATTERY ARE PLUGGED IN
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02-22-2010 09:55 PM  10 years ago
Gyronut

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Martinsville In.

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You have just invented 3 phase Dynamic Braking...........Rick
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02-22-2010 10:26 PM  10 years ago
brettman

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SOUTH DAYTONA FL.. u.s.a.

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lol the esc has to be storing some current to be doing this,probably cause it is broken?
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02-22-2010 11:12 PM  10 years ago
DougsRC

rrProfessor

Mass.

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The Esky 3900 motor is on sale at HeliDirect for 14.95 I believe. I like this motor, if one of the magnets came loose it will be very hard to turn. Also if the shaft running thru the outrunner is not perfectly straight it will turn a little then catch. There is very little clearance between the outer can and the inner stator.
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02-22-2010 11:17 PM  10 years ago
DougsRC

rrProfessor

Mass.

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Whoops, just checked -- 16.99 and only one left
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02-22-2010 11:21 PM  10 years ago
brettman

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SOUTH DAYTONA FL.. u.s.a.

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ya doug this is the motor i mean i just bought it cause smoke came out the motor so i thought it was the motor, to find out the new one dosn't work so it must be the esc so i fiqure ill get another esc and hook up the external bec i have at the same time
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