Suggestion: If you don't like the design, you can take out the L-Shaped piece and the inner frame and use the same type of chain and only the big gears to drive. This would make it look much more like a tank.
p.s. if you like it, please vote for me for the competitions rptech
Step 1: Designing
You can use anything you want to design. I used an open source 3d animation program called blender to generate animations and images of the intended project. To make the blueprints, I rendered 3d meshes as 2d images.
The next thing I did was use a program called gear generator to print life size images of the gears. I then attached the images to wood and cut it out with an electric coping saw. I used such dies to cut out the gears.
Step 2: Chain
Step 3: The Support
Rubber rollers (from a printer) were used on the top bar for a smoother movement of the chain.
Motor used is a windshield wiper motor attached to a motor cycle well cell battery (also works with a drill battery)
Step 4: Programming and Control
All wires are attached to the switch which is connected to an aluminum bar that is connected to a servo.
When you move the servo, the switch drives one of the tracks forward or back
for programming, I used a controller called the E-Z Robot Bluetooth controller but you can use any rc controller
I assigned ports to the controller and programmed (it's free software) in a way that when you press a button, the servo moves to a certain degree (in this case, a 90* turn) and returns to it's stable position in the middle.