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Bill,
I don't know how to convert thrust to horsepower
but you can do it with the electrical specifications.
It takes 746 watts to develop one horsepower.
Watts are Volts multiplied by
Amps.
Volts
times Amps
equals Watts Divide by
746 equals Horsepower
For example:
12 V
X 40
A
= 480W
/
746
= .64
HP
This is in a perfect world.
You may want to down rate the actual HP a bit to
account for electrical loss in the motor. Probably about
10%.
Dan H.
----- Original Message -----
Sent: Thursday, February 17, 2005 2:26
AM
Subject: Re: [PSUBS-MAILIST] Pounds of
thrust equates to what horsepower?
Hi Dan. It's Bill again.
The only info that came with my minnkota motor
was to say that it is 74 lbs thrust. Do you know how many horsepower that
is?
Also would you know where I could find an
online conversion scale so I could always tell how many lbs of thrust
equated to what horsepower?
Thanks.
Kindest Regards,
Bill Akins.
----- Original Message -----
Sent: Wednesday, February 16, 2005
10:30 PM
Subject: Re: [PSUBS-MAILIST] ETEK motor
(speed controller for this?)
Brian,
My motors run around 1800 RPMs top speed.
I have two 3/4 HP side thrusters
and one 3 HP rear thruster. Slower
then that would be better.
I think 3600 is quite high. The
people you want to talk to are the
engineers at a company like Michigan
Wheel. They make props for a living
and will help match you up with
something. Psub size props are on their
really small end but
they'll help you crunch the numbers.
Not only is the Eket motor fast
for a direct drive prop on a sub but it's so
much more power the you'd
need and you'll hardly fit the required pile of
batteries in a Psub to
use that much power for any length of time.
Now, if your calling a
boat the size of Carsten's a Psub, you can use all
those horses.
Dan
H.
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