Øystein,
350 lb thrust will require in the order of 10
-15 kW electric motor. To power this regardless of voltage you will
consume battery power equivalent to
500 - 1000 kg batteries pr. hour of
operation. It can be done with 24 or 48 volt motors - and if this is your
intention look into the motors used on electric forklifts or electric
cars. In this I assume you will have the motor(s) inside your
pressurehull.
If the electric motor is only engaged when
diving - it is the only solution and its ok since you are not likely to
travel long distances submerged . But if you plan to sail the boat
surfaced on batteries you will find that if
the range required is more than a very few nautical miles,
the electric propulsion is very expensive, and very
inefficient. If you add even the smallest marine diesel engine to
your boat you will be able to improve range hundredfold.
A submarine propulsion system can consist of
a standard marine diesel engine with a reduction / reverse / clutch gear
device and an electric motor driving the propellers haft via V - belts
when the marine engine is stopped and the gearbox lever is in neutral.
This is how simple its done on our boat Kraka - and it works fine.
I looked at your drawings - I assume a sail
will be added to the concept ?!
Regards,
Peter Madsen
----- Original Message -----
Sent: Tuesday, May 08, 2007 6:19
AM
Subject: [PSUBS-MAILIST] Submarine
motors
Hi
Have been looking all the www for motors for my project. I believe
I will go for el motors. There are several companies offering electrical
motors, but a lot of the motors are running on to high voltage > 120
VDC. I would like to keep the voltage down. Also it is important that
the motor i sealed, rated for approx 300m. I need about 350 lb of thrust
in either one or two motors.
Anybody know where to find the best prizes on what I am looking
fore?
--
Best Regards
Øystein Skarholm
www.ubat.no
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