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Bad J3 Problem - PLEASE HELP

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Old 03-06-2008 | 12:47 PM
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From: London, UNITED KINGDOM
Default Bad J3 Problem - PLEASE HELP

My Piper Cub J3 arrived 2 months ago, but it been sitting all my table all these months.
Reason is the motor's stopped working, heres my story...

When it came it worked perfectly and I was inpressed at my first plane, I took it to the park but my trim was not set.
I didnt realise so I went home without actually getting it to take off, I was to fly it 2 weeks later with my brother.

2 Weeks later...
I charged it for 2.3 hours and set off, after getting all the way to the park I turned the plane off and my brother was ready to hand launch it. As I increased the throttle to full the motor stopped working, I pressed the boost button but it did the same thing.
I took it home and studyed the plane presicely, everything was normal. But it still did not work, i gave the battery's a little more juice and tryed again another day. Now the rotor only nudged and it didnt spin at all.

Im a bit annoyed that a spent $144 (around £75) buying the plane and getting it to the U.K. and now it doesnt work.

CAN ANYONE HELP ME!!!!!?????!!?!! [&:]
Old 03-06-2008 | 01:40 PM
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From: Savannah, GA
Default RE: Bad J3 Problem - PLEASE HELP

What Cub are we working on

lets start by eliminating the most common problems

1st test the batt and be sure it is indeed charged properly
you should cycle your battery a couple of times, now if your motor won't spin up this could be difficult to do
try charging your batt till it gets good and warm, then right away hook it up and try the motor
if it doesn't spin try holding the reset button down while giving it throttle, if the motor comes to life the reset circuit is bad. this button is a safety feature that creates more headaches than it helps, IMHO,,, I used to always cut mine out and solder the wires together.

If the motor doesn't run then check ALL your connections very carefully, tug on the wires a little to insure they are secure to all coponents

If you have a volt meter, test the leads at the motor while holding the throttle at full, this way you know if the power is getting to the motor

you can also take a d cell batt and tape wires to each end than touch them to the leads of the motor, this will tell you if the motor is working or not

Always, always remember to remove the prop when doing these test

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