Re: Any Suggestions? [TANKS]

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

Byron,

At 04:22 PM 2/21/2005 +1300, Byron <klingemeister-at-gmail.com> wrote:
 > I was going to use the Tyng Track System driven by 2 Mini-EV motors
 > (see http://www.robotcombat.com/marketplace_motorsmisc.html) attached
 > to the drive wheel by a bike chain

Most current tanks use about 4 inch diameter drive
sprockets turning at about 400 rpm.  That produces
4.76 mph.  I estimate that you need about 400 in-lbf
sprocket torque per track to perform a full skid turn.

Using a 45:1 reduction on the Mini-EV motors to reduce
18000 rpm to 400 rpm, increases torque from 4.04 in-lbf
(64.64 in-oz) to 182 in-lbf.

It appears that you would need two Mini-EV motors per
track (and two 45:1 reducers per track) to provide sufficient
sprocket torque.

At 05:29 PM 2/21/2005 +1030, "chris barthelson" <barthelson88-at-hotmail.com> 
wrote:
 > You could try the "EV-X" motors from www.surpluscenter.com they are
 > only $16.95 and the shiping is pretty reasonable. you could also have a
 > look at this site http://www.oatleyelectronics.com/motors.html they have
 > very good prices on a few different motors and they would only have to ship
 > from Australia.

The SC300 24V 300W scooter motors from Oatley ($36 Aus) are the same
ones that I tested for my post on Feb 9 2005
http://www.rctankcombat.com/archive/current/msg00156.html

Oatley's motor SC250G ($79 Aus) looks particularly promising. Although it
is more expensive, it already has a gear reducer built into it.

Both of these motors are manufactured by Unite Electric Motors
http://www.unitemotor.com/ with part numbers MY1016 and
MY1018slowdown respectively.  Unfortunately, I have not been
able to find a vendor in the US who carries the MY1018slowdown.

At 06:47 PM 2/21/2005 +1300, Byron <klingemeister-at-gmail.com> wrote:
>Also, How many channels does it require to run an Anvilus or Tri pact
>speed contorller?

two channels

Both speed controllers perform right-left mixing to use one
joystick for driving.

At 09:25 PM 2/21/2005 +1300, Byron <klingemeister-at-gmail.com> wrote:
>How would the paintball gun elevation and firing work, could theu
>possibly be combined into one channel?

They could be combined but it would be very difficult to do.

I recommend buying a five or six channel radio.
2 ch for tracks
1 ch for turret rotate
1 ch for gun elevate
1 ch for trigger

You can use a 4 channel radio for a tank destroyer
with no turret.

Joe


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