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Re: [PSUBS-MAILIST] Fuel cells
Hi Ken,
Motor Guide has the most powerfull motor with 107
Lbs, vs 101 for Minn Kota.
Its brushes are larger for more current and battery
efficiency.
I experienced power failures with Minn Kota
motors with no apparent reasons, never with Motor Guide.
You can imagine how stressful can be a situation
when a sub loses its mean of propulsion.
After disassembling, investigation and testing, it
appeared that the contact between the commutators and the coil got poor because
of moisture, not even water.
Though I tested successfully a motor guide
that I completely flooded with salt water, ran it a while then
stopped, I drained it and flushed it with a solvent to remove water and
salt, the motor did not sufffer any damage and later kept running well without
any other intervention. A Minn Kota does not stand such harsh test
!
Motor Guides motors are also much easier to
service, take apart and assemble.
My motors are pressure balanced or @ ambient
pressure, the inside body motor is maintained at a pressure about the same that
the outboard water pressure, keeping the water out where it does not belong
regardless of the operating depth.
The system is fed with compressed air through
a regulator, compressors normally delivers dry compressed air, however some
moisture could built up inside the motor which makes the Motor Guide
motors more reliable since Minn Kota do not stand any
moisture.
This principle (ambient pressure) was used for
the first time 50 years ago by Cousteau for his cameras housings and is
very effective and inexpensive, some sub manufacturers tried or claim patent for
that which is not lawfull since a principle
cannot be patented.
regards
Herve Jaubert
----- Original Message -----
Sent: Saturday, November 25, 2000 6:50
PM
Subject: Re: [PSUBS-MAILIST] Fuel
cells
Hello Herve,
I'm interested in your
statements about the Motor Guide Motors being more
reliable, more powerful
and pressure compensated. Could you expand on that?
Do you have any
quantitative data?
Ken Martindale
In a message dated 11/24/00
9:43:27 PM Eastern Standard Time,
caribsub@coqui.net writes:
Subj: Re: [PSUBS-MAILIST] Fuel cells
Date: 11/24/00
9:43:27 PM Eastern Standard Time
From:
caribsub@coqui.net (Herve Jaubert)
Sender:
owner-personal_submersibles@psubs.org
Reply-to: personal_submersibles@psubs.org
To: personal_submersibles@psubs.org
Hi Pat,
Thanks for the link.
I first used Minn
Kota Trolling motors for my subs, I am using now Motor
Guide, more
powerfull and more reliable, pressure compensated installed,