Motor capacitors

[BCRandy]

I am building an air boat for my nephew out of bits I've
picked up here and there and I've come up with a question.
I'm using a speed 600 brushed motor with a 3800 mAh, 6 cell
NIMH battery pack and a 35 amp ESC with a BEC.

My web research came up with some conflicting info about
using capacitors to reduce radio interference from the motor
(mine has none). One source said "never put a capacitor
between each terminal and the motor's case - It will short
out the motor". However, the Powerboat Forum.com info said
to put a .01 mfd capacitor from each terminal to the case
and a .047 mfd capacitor across the motor's terminals.

Based on park flyer motors I've looked at in my LHS, I'm
tempted to believe the latter advice, but I would appreciate
input from those more knowledgeable than I. TIA.

[funfly3]

BCRandy wrote:
> I am building an air boat for my nephew out of bits I've
> picked up here and there and I've come up with a question.
> I'm using a speed 600 brushed motor with a 3800 mAh, 6 cell
> NIMH battery pack and a 35 amp ESC with a BEC.
>
> My web research came up with some conflicting info about
> using capacitors to reduce radio interference from the motor
> (mine has none). One source said "never put a capacitor
> between each terminal and the motor's case - It will short
> out the motor". However, the Powerboat Forum.com info said
> to put a .01 mfd capacitor from each terminal to the case
> and a .047 mfd capacitor across the motor's terminals.
>
> Based on park flyer motors I've looked at in my LHS, I'm
> tempted to believe the latter advice, but I would appreciate
> input from those more knowledgeable than I. TIA.
>
>
a lot of model motors already have a capacitor fitted internally, have a
close look near the terminals and you might see a small wire joined to
the terminals, I have several electric gliders and none have any
external capacitors and the range is farther than I need

[BCRandy]

I just re-checked - no capacitors inside, as far as I can
see...

"funfly3" <dontemailme@ntlworld.com> wrote in message
news:1bmTh.2048$3d1.1465@newsfe7-gui.ntli.net...
> BCRandy wrote:
>> I am building an air boat for my nephew out of bits I've
>> picked up here and there and I've come up with a
>> question. I'm using a speed 600 brushed motor with a 3800
>> mAh, 6 cell NIMH battery pack and a 35 amp ESC with a
>> BEC.
>>
>> My web research came up with some conflicting info about
>> using capacitors to reduce radio interference from the
>> motor (mine has none). One source said "never put a
>> capacitor between each terminal and the motor's case - It
>> will short out the motor". However, the Powerboat
>> Forum.com info said to put a .01 mfd capacitor from each
>> terminal to the case and a .047 mfd capacitor across the
>> motor's terminals.
>>
>> Based on park flyer motors I've looked at in my LHS, I'm
>> tempted to believe the latter advice, but I would
>> appreciate input from those more knowledgeable than I.
>> TIA.
> a lot of model motors already have a capacitor fitted
> internally, have a close look near the terminals and you
> might see a small wire joined to the terminals, I have
> several electric gliders and none have any external
> capacitors and the range is farther than I need

[funfly3]

BCRandy wrote:
> I just re-checked - no capacitors inside, as far as I can
> see...
>
> "funfly3" <dontemailme@ntlworld.com> wrote in message
> news:1bmTh.2048$3d1.1465@newsfe7-gui.ntli.net...
>> BCRandy wrote:
>>> I am building an air boat for my nephew out of bits I've
>>> picked up here and there and I've come up with a
>>> question. I'm using a speed 600 brushed motor with a 3800
>>> mAh, 6 cell NIMH battery pack and a 35 amp ESC with a
>>> BEC.
>>>
>>> My web research came up with some conflicting info about
>>> using capacitors to reduce radio interference from the
>>> motor (mine has none). One source said "never put a
>>> capacitor between each terminal and the motor's case - It
>>> will short out the motor". However, the Powerboat
>>> Forum.com info said to put a .01 mfd capacitor from each
>>> terminal to the case and a .047 mfd capacitor across the
>>> motor's terminals.
>>>
>>> Based on park flyer motors I've looked at in my LHS, I'm
>>> tempted to believe the latter advice, but I would
>>> appreciate input from those more knowledgeable than I.
>>> TIA.
>> a lot of model motors already have a capacitor fitted
>> internally, have a close look near the terminals and you
>> might see a small wire joined to the terminals, I have
>> several electric gliders and none have any external
>> capacitors and the range is farther than I need
>
>
as long as you use non polarity capacitors you cannot short out the
motor and adding extras should not make it any worse only better

[Jim Slaughter]

Go with the advice from the Powerboat Forum!!

"BCRandy" <RMAHEUXR@bellsouth.net> wrote in message
news:yeeTh.227$pG2.225@bignews2.bellsouth.net...
>I am building an air boat for my nephew out of bits I've picked up here and
>there and I've come up with a question. I'm using a speed 600 brushed motor
>with a 3800 mAh, 6 cell NIMH battery pack and a 35 amp ESC with a BEC.
>
> My web research came up with some conflicting info about using capacitors
> to reduce radio interference from the motor (mine has none). One source
> said "never put a capacitor between each terminal and the motor's case -
> It will short out the motor". However, the Powerboat Forum.com info said
> to put a .01 mfd capacitor from each terminal to the case and a .047 mfd
> capacitor across the motor's terminals.
>
> Based on park flyer motors I've looked at in my LHS, I'm tempted to
> believe the latter advice, but I would appreciate input from those more
> knowledgeable than I. TIA.
>