Re: Motors and Speed Controllers [TANKS]

[Joe Sommer <anvilus9-at-adelphia.net>]

Trevor,

At 07:10 PM 2/19/2006 -0700, "Trevor Vickers" <tkv000-at-gmail.com> wrote:
>the motors I plan to use are as follows:
>Fortress Scientific
>SH Series
>TYPE: A9YIX00271
>24V DC
>15A CURRENT
>OUTPUT 84 IN-LBS (by my converter, thats 7 Foot pounds)
>172 RPM

Your motors may be too small.  84 in.lbf at each sprocket will
not be sufficient torque for skid turns on grass.  172 rpm will
produce 2 mph with a 4 inch diameter sprocket.

I recommend the Rule of Fours
http://www.rctankcombat.com/archive/2005-12/msg00263.html

4 inch DIA drive sprockets
400 rpm at each drive sprocket
400 in.lbf torque at each sprocket
produces
4.7 mph with sufficient torque for skid steer

Joe


**********************************************
Joe Sommer, Anvilus Machine Works
2378 Nantucket Circle, State College, PA 16803
814.234.4773     anvilus9-at-adelphia.net
http://www.anvilus.com