RE: 1/6 scale SWAMPCAT from Wa.

["Nick Hoke" <nhoke-at-nksd.wednet.edu>]

Hi Steve,

I just found out the two surplus treadmill motors I bought are not
recommended for a SWAMPCAT.
I located the manufacturer and this is what they said:

*********

Nick,
I spoke to one of our Technical Account Managers, and this was his advice:
The motors are rated at 120V and typically run between 35 and 90 volts DC
in the original application, using an SCR control.  These motors are not
designed to be used on low voltage applications and may run hot or create
brush arcing in your project.  I can not recommend that you use them in any
other application than they were originally designed for.
I will however provide some guidelines and general information if you
decide to use the motors.  As you probably know, the motor speed will
increase with the voltage.  It would probably be best to go to the 36V, if
your project will allow the higher RPM.  You should also consider how you
will keep the motor cool - it will require some sort of external cooling
device.  Also, be aware of potential demagnetization.  These are permanent
magnet motors so they will demagnetize if a large in-rush current occurs.
This is caused by applying power without limiting the current or quickly
changing the operating direction without ramping the applied current up.
Last of all be aware that these motors are designed to run in the clockwise
direction as viewed from the opposite lead end of the motor.  You can run
them in reverse, but they will be less efficient and draw more current.


Regards,
Shelley

*******************

So now I need two electric 12vdc motors, I'm currently looking at old
wheelchair
and electric scooter motors. Anybody have any great ideas about this part
of my project?

Thanks,

Nick Hoke
Kingston, WA











-----Original Message-----
From: tanks-admin-at-rctankcombat.com
[mailto:tanks-admin-at-rctankcombat.com]On Behalf Of Steve Tyng
Sent: Tuesday, April 06, 2004 10:57 PM
To: tanks-at-rctankcombat.com
Subject: RE: 1/6 scale AFV from Washington state


Nick,

Interesting vehicle.  What questions do you have about proceeding?

Steve T.