RE: Using alternative motors

[paul needham <paul.2.needham-at-btconnect.com>]

Hi all

Hope this may help

There are 2 ways to attempt to decide the suitability of a motor to 
powering a tank.

1:- look at the weight it is able to handle in it's normal job and the 
speed it works at
i.e a pair of KCM's can carry a given child [ weight] at a given speed [ 
both usually quoted in adverts for the childs vehicle ] and if the speed is 
too great it can be geared down which will mean a slower a tank but one 
that can carry more weight.

or

2:- look at it's electrical specification.
i.e     Electrical power is measured  in Watts where
Watts = Volts * Amps            and             760 Watts = 1hp [ horse power ]

KCM motors at 12 volts draw approx 10 amps and so have 120 watts available 
with 2 = 240 watts or 1/3 Hp

Now EV Warriors can draw up to 90 amps ? at 12 volts ? giving 980 watts 
each with 2 = 1960 watts or 2.7 Hp
[ don't quote me on these figures as I don't know !]


The above is a gross over simplification but should put you in the right area.
Look for motors that are designed to run continuously and with a sensible 
current draw [ as this determines battery size  and so running time]
Possible sources are
Wheel chairs
Kids toys KCM's
Kids scooters
Electric golf caddys

regards paul



At 11:07 12/04/2004, you wrote:
>  From my experience, a starter motor would draw way too many amps to last a
>long battle , they are heavy and can get very hot when used continueously.
>Not very efficient.
>
>
> > [Original Message]
> > From: WJ <WJ-at-vdtogt.nl>
> > To: <tanks-at-rctankcombat.com>
> > Date: 4/11/04 10:59:22 AM
> > Subject: Using alternative motors
> >
> > Could anyone help me out on this question I have:
> >
> > I am looking for a 12V motor I could use for each track. So far I looked
> > at several motor-types, which you guys use for your tanks.  I like the EV
> > Warrior that is recommended a lot, but I was hoping for a motor that's
> > more easily available here in the Netherlands, and equivalent in
> > performance.
> >
> > I have no clue how to compare the performance of for example
> > windshield-wiper motors to the EV's,  and I am even thinking about
> > starter-motors for cars.  Im sure those wiper motors will last some time
> > under continuous use, but are starter motors able to?
> >