Use two size 19 rubber bands to secure the panel around the body of the car and chassis. Chassis Use pressed Styrofoam to build the prototype chassis. Corrugated cardboard also works well. Students can build a solar car with a balsa wood chassis once their prototype car is approved. Use a hot glue gun to secure the motor to the chassis.
Balsa wood works best.
A scroll saw is excellent for making cuts to decrease the mass of the wood. Guidewire Use a right angle square to properly align the axles on the chassis. The ideal track is a 60-mm rubber track. 15 pound shingle underlayment felt and butcher paper work nicely, but will need to be taped to keep gusts of wind from dislodging the track. Adding a Gear to the Motor Common gears tend to be smaller at one end.