Next message: mike senko: "Re: lv-ab: Galvanic currents"
Roger,
Don't count on being able to compensate your compass. When
you turn that motor on the magnetic field formed WILL be
different every time. Also magnetic fields propagate in ALL
directions so unless the manufacturer has done something
amazing I don't think what plane the motor is mounted in
will make much difference.
There IS such a thing as magnetic shielding (MU-METAL)
but it is not ALL THAT effective.
Mount the darn thing where one of your existing winches
currently resides and reroute the sheets, halyards, etc.
through blocks and rope clutches to achieve the same result.
Eric Thompson
S/V Procrastinator
South San Francisco
Roger wrote;
I figured out that with the use of sheet stoppers I can make
one electric winch mounted on a pedestal directly in front
of the pedestal/binnacle do all the halyards and sheets on
my 37C. The motor for the winch would be in front of (3 to
4") the compass and 2 to 3" below the compass. I know
because of the permanent magnets in the motor and the mass
of metals some compensation will have to be done to the
compass. Do you all think that the compass can be
compensated with all that stuff so close. Also what happens
to the magnatism when the winch is actually running?
I talked to a techie at Lewmar and he said because the motor
was not on the same plain as the compass "no problem". At
$3000.00+ I'm seeking other opinions.
Roger
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