Re: Motors and Speed Controllers [TANKS]

["Trevor Vickers" <tkv000-at-gmail.com>]

Thanks Joe, I'm just getting into this so I'm not to familiar with gearing and such. Love your JagdPanzer the paint job is awsome. How are you finding the plastic conveyer tracks so far?

On 2/20/06, Joe Sommer <anvilus9-at-adelphia.net> wrote:

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