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Blade CP Pro › CP Pro 2 caught fire
04-03-2009 09:01 PM  9 years agoPost 1
BeefSupreme

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SLC, UT

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I had to rebuild my CP Pro 2 from the ground up due to a very bad crash.

After moving everything over to a new frame, I hooked up a battery and started testing the connections. Everything was working correctly until I tested the rudder controls. When I applied just a little right rudder the tail wiring caught fire.

The fire seems to have only damaged the tail wiring itself but I am concerned about damage to the electronic components, specifically the tail motor, gyro, and speed control.

I can't find a wiring schematic anywhere for the cp pro 2. Does one exist?

Also does anyone know what would be the cause of this? I don't want to make the same mistake twice.

Thanks,

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04-03-2009 09:06 PM  9 years agoPost 2
gian

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AZ

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Possibly a bad tail motor or the tail motor wires are shorted at the tail motor. Otherwise, you've hooked the main motor output to the tail motor.

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04-03-2009 09:15 PM  9 years agoPost 3
BeefSupreme

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SLC, UT

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Thanks for the reply.

How is the tail motor supposed to be connected? There is a capacitor between the + and - connections and the negative connection is soldered to the black wire and also to the motor housing. I just duplicated what my damaged tail looked like with the new parts.

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04-03-2009 09:48 PM  9 years agoPost 4
Hurlchucker

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Oregon,USA

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I don't know if this will help you but it's worth a shot. Now let's see if I copied the link correctly...

http://www.helihobby.com/html/separate_electronics.html

Good luck!!

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04-03-2009 09:52 PM  9 years agoPost 5
gian

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AZ

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Hi,
Did the tail motor spin at all just before your hellish encounter? Is it possible that the + wire is stripped a little too far back on the motor end and it's touching the motor can or anywhere else on the motor? Also, if you hook up a 9v battery to the tail motor, does it spin? Maybe the wires were chafed and shorted somewhere in the middle?

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04-03-2009 10:40 PM  9 years agoPost 6
BeefSupreme

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SLC, UT

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I will check the positive wire for any possible shorts.

Do anyone know the purpose of the capacitor connected to each pole of the motor?

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04-04-2009 04:14 AM  9 years agoPost 7
JohnM

rrApprentice

Providence, RI - USA

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The capacitors are used for RF noise suppression. They prevent the motors from causing interference with the receiver. Probably not an issue with a 2.4 GHz RX, but with a FM radio system, these are needed to avoid interference.

John

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04-04-2009 04:17 AM  9 years agoPost 8
JohnM

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Providence, RI - USA

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You may want to check if one of the capacitors is internally shorted or if it is shorting out the motor by touching both + and -

A good test would be to remove the wires from the tail motor and connect the terminals to a 1.5 volt battery and see if the motor spins.

John

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04-05-2009 02:53 AM  9 years agoPost 9
helidevil

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Brunswick, ME

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WOW!

SUPER COOL lol

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