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Re: [PSUBS-MAILIST] electric forklift motor
I don't think so. It doesn't work like that.
The torque doesn't quadruple if you slow a 4000 RPM motor to 1000 RPM with a
speed controller. HP is a function of speed and torque. If you reduce a
motors speed with a speed controller, you reduce the RPM's but the torque
remains the same, there by reducing the HP output in proportional to the
speed reduction.
A gear reduction would be more efficient but has it's losses and additional
noise.
Yes, they are good long running motors.
Dan H.
----- Original Message -----
From: "mark" <vagabond1@bigpond.com>
To: <personal_submersibles@psubs.org>
Sent: Monday, November 22, 2004 8:29 AM
Subject: Re: [PSUBS-MAILIST] electric forklift motor
> if you use a forklift motor you have in excess of 4 hp at any
> revs thats what there designed for there slow reving and very
> powerful and designed to last over a 8 hour working shift
> At 10:51 PM 22/11/2004, you wrote:
> >I was considering using a golf cart motor along with some others I found
> >in surplus catalogues but most of them are quite high RPM motors and have
> >short splined shafts. I didn't want to use a gear reducer and 4000 RPM
is
> >to fast for a prop.
> >
> >You can slow them down with a speed controller but by doing so you reduce
> >the output horsepower. If you take a 4 HP motor @ 4000 RPM and limit it
> >to 2000 RPM, you only have 2 HP of usable power.
> >
> >Dan H.
> >----- Original Message -----
> >From: <mailto:noperiscope@yahoo.com>No Periscope
> >To:
<mailto:personal_submersibles@psubs.org>personal_submersibles@psubs.org
> >Sent: Sunday, November 21, 2004 5:44 AM
> >Subject: Re: [PSUBS-MAILIST] electric forklift motor
> >
> >In all honesty,,,the motor from a golf cart is probably the best
> >ticket. It comes with controls and is 24 or 36 volts. Ample power new
> >off the shelf. Digital controls and off you go. Dave from
Florida........
> >
> >mark <<mailto:vagabond1@bigpond.com>vagabond1@bigpond.com> wrote:
> >STEVEN the forklift motor is seperate no hydrolic pump or rams but can
> >purchess them along with main motor
> >At 03:18 PM 21/11/2004, you wrote:
> >
> > >Thank you Mark,
> > >
> > >That was very generous of you.
> > >
> > >Good to see you on-board [ finally : ) ]
> > >
> > >In addition to that motor, does the forklift
> > >have any hydraulics ie., lifters? Do you or
> > >anyone in this forum envision a potential use
> > >for this?
> > >
> > >cheers, --Steve
> > >
> > >
> > >
> > >
> > >On Sun, 21 Nov 2004 12:45:20 +0930, mark wrote:
> > >
> > >> Hello everyone my name is mark cole i live in darwin australia and
have
> > >>been on your mailing list for some time and have to say i admire you
all
> > >>anyway have anyone thought of using a 48volt electric drive motor from
a
> > >>forklift to prope! l a submarine . here we can buy the used drive
motors
> > >>and full wiring harness for as little as $700.00 dollars and if they
can
> > >>propell a forklift with a pallet of gear they must surely be able to
> > >>drive a large prop .
> > >>
> > >>i also would like to know if anyone has a set of plans for a sub that
> > >>can hold two ppl with ease say bigger than a k350 i would really
> > >>appreciate some help getting plans anyway thanks to everyone and a BIG
> > >>THANK YOU TO STEVEN MILLS FOR YOUR HELP MATE cheers mark in darwin
> > >
> > >
> > >
> > >--
> > >
> > >
> > >
> >
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