Here's what you'll need for this project:
-2 thin wooden disks
(I literally was walking to work and a construction worker was throwing these perfect wooden disks out. They were very thin and light. Some type of balsa wood maybe. You could probably cut them out of thin plywood or heavy cardstock)
-2 cheap remote control cars
(If you have 1 or 2 of these laying around then you're set! Other wise pick up a few at K-mart or a garage sale. All you need it the forwards and reverse motor.)
-Some scrap wood
(We used what we had laying around: 15 inch. length of 1"x3", 7 inch. length 2"x4" and a plywood base roughly a 1 ft. square.)
-Insulated copper wire
(Just your standard wire we had laying around the shop.)
-Misc. mounting hardware
(Really a hodge-podge of screws, washers, nuts and bolts we had laying around. The one thing we bought was 8 "tapered faucet washers." They are big rubber washers that help secure the R/C car wheels to the wood disks.)
(You can pick this babies up at Radio Shack and use them like dimmer switches for the R/C motors.)
For the complete video, watch below!
Step 1: Prepping the Cars
Step 2: Wiring in Your Rheostats
Step 3: Prepping the Wooden Disks
Step 4: Putting Everything Together
some wood screws and go right through the plastic to the 2"x4". Make sure it's firmly attached and you still have access to the batteries and on/off switch. Next mount the 2"x4" to the plywood base with "L" brackets. Now we can attach the first wooden disk to the tire of Car A. You already know where the center is so just use some bolts, nuts and faucet washers to mount one of the disks to one of the cars rims.
Next mount the wheel and motor assembly of Car B to one end of the 1"x3". Then mount the other end of the 1"x3" to the wooden disk that is mounted to Car A. Take care to try and balance this.
Now you can mount the second wooden disk to Car B's wheels and motor. Use the extra length of wire and attach the circuitry and battery pack of Car B to the base. We used Velcro. Finish up with the paint job of your choice.