Re: [PSUBS-MAILIST] Pressure Compensated Trolling Motor Question

[Michael Wright <mwright@smallip.com>]

Pierre Poulin wrote:

> what about a magnet inside? There is one on top of the drain plug on my 
> ATV. I don't know if the brush residue is "magnetable"...

unfortunately the brush matrial is more or less pure carbon, and 
therefore is not attracted to magents.

m

> 
> Pierre
> 
> 
> 
>> From: Warren Greenway <opensourcesub@yahoo.com>
>> Reply-To: personal_submersibles@psubs.org
>> To: personal_submersibles@psubs.org
>> Subject: Re: [PSUBS-MAILIST] Pressure Compensated Trolling Motor Question
>> Date: Fri, 27 Jun 2003 09:26:53 -0700 (PDT)
>>
>> That could work. Put a one-way trap filter inside the
>> trolling motor housing. Why not?
>>
>> Warren.
>>
>> --- Chris Nugent <dirkpitt77@yahoo.com> wrote:
>> > Ok, I'm tired and I have the flu, and on top of that
>> > know nothing much besides the basic idea behind
>> > pressure compensation, so don't hold this question
>> > against me.  But, it occurred to me, and here it is:
>> >  What about using the trolling motor itself to drive
>> > a pump to move the compensating fluid through the
>> > filter?
>> >     Too much power loss?  Too complicated?
>> >
>> >    Nuge
>> >
>> > Michael Wright <mwright@smallip.com> wrote:
>> > Hi Everyone,
>> >
>> > I have a question for anyone using Liquid
>> > Compensated Trolling motors.
>> >
>> > I've heard that the drawback to them is that the
>> > carbon dust from the
>> > brushes goes into suspension and eventualy causes a
>> > ground fault to the
>> > case (or direct short if no ground fault detection
>> > is used). This seems
>> > quite plausible with the simple solution being to
>> > change the
>> > compensating fluid regularly.
>> >
>> > The quesitons I have are: Is this a problem worth
>> > solving in a better
>> > way? Is the particle size large enough for an
>> > automotovie oil filter to
>> > catch them?
>> >
>> >
>> > The trick I think is to use a drill powered oil
>> > change pump to circulate
>> > the compensating fluid through the filter. Since the
>> > pump has no motor
>> > and no air spaces it is pressure compensated by the
>> > thruster fluid.
>> > Cycling the full volume of oil through the filter
>> > would take less than a
>> > minute and could be done with a cordless drill (safe
>> > and expendable).
>> > Since the compensating system stays closed there is
>> > no mess and no need
>> > to bleed the air out of the system.
>> >
>> > So that's the idea.
>> >
>> > mike
>> >
>> >
>> >
>> > ---------------------------------
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>>
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> 
> 
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