In this instructable we create an elastic (rubber band) powered car from scrap material. The car uses a few important physics principles to travel and also teaches skill to use the all important GLUE GUN! There is a lot of variations of elastic powered "cars" and this variation adds a little elegance to the bunch. This one also does not get your fingers caught in a mouse (or rat) trap. I have built three versions to date, all using different chasis and this one, although not the fastest, is the one that travels the longest distance.
Step 1: Materials and tools
Look at the pic and improvise.. This is a very flexible piece of work that can be modified as you go along. Ignore the soldering iron in the tool picture, it was taken from another instructable.
Plastic drinking straws
Small (25ml) plastic containers
Old/used optical media for wheels
Other plastic caps for wheels (Size does not matter!)
Step 2: Rear shaft and lever assembly
Use three wooden skewers (one cut short) and make a cross as shown in the picture. Stick everything together with epoxy putty. There are other ways to do this, but I found this the easiest and fastest way.
Step 3: Drive preparation
I melted notches and holes into the plastic cups I selected with a hot nail.
Step 4: Complete the drive
Use your glue gun to attach the plastics cups (or whatever you chose) to the rear-axle cross assembly.
Step 5: Build the chassis
Look at the pictures and use your glue gun to assemble the chassis as shown. I have not added any dimensions to this design. Figure it out as you go along.
Step 6: Attach drive assembly to chassis
The drive assembly which will help add stretch to the rubber band is attached to the rear wheels. The drive assebly which is fixed to the rear axel should allow the wheels attached to also rotate freely.