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Hi, Frank . . .
Hmmm . . . ok. Actuators. I'd like to keep electrical stuff to
a minimum, especially because my boat's going to be an ambient. I don't
have the press. differential to deal with. If I was going 1-atm. I'd
probably follow your route. I dislike hull penetrations but your ball
valves are a great idea. I used to have a 36 ft. tri-cabin and I had ball
valves where needed. Still didn't like penetrations and my boat didn't
have to dive.
That having been said, I can see the simplicity in an electrical thru-hull
connector. The MinnKotas are electric, so an argument could be made for
the actuators in an ambient, too.
How smooth are the actuators? Do they tend to be jerky or linear with
the input? And what about the control end? I know only basic
electronics and nothing about motor controls.
Rick
----- Original Message -----
Sent: Tuesday, October 20, 2009 1:18
PM
Subject: Re: [PSUBS-MAILIST] Thruster
mounts
Hi Rick. The K boat plans call for shaft seals on rotating shafts with
handles inside to control thruster angle relative to level and/or direction of
rudders.
I prefer to eliminate the rotating shaft and seal idea.
My motor angle and rudder set up will be controlled by electric actuators
with just epoxy filled thru-hulls for the electrical connections.
The 4 identical motors each have their own thru-hull with 4 pins sealed
in epoxy. 2 pins for the motor and two for the actuator. ( this leaves me with
one extra set of pins in case I want to add rear dive planes later.)
The "block V " seals the guys use are well tested and reliable for the
shaft penetrators and I'll let them speak about those. I just like to be able
to put a valve on all the holes that go through the hull.
Frank D.
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