# MAKING A SQUARE WHEEL AND ITS TRACK

Square wheels are really cool but the only catch is that you need to build a track for them.
This instructable tells you how you can make your own square wheel and its track easily at home.
THINGS YOU NEED:
*Thermocol / hard foam
*kebab skewer
*compass
*sketch pen/marker
*cutting knife
*glue
*ruler
WHAT TO DO
1.Mark and cut out a thermocol square of side 5.5 cm.
2.mark its center and put a kebab skewer trough the center.Glue the skewer in place.This will help you turn the square.
Tape the edges of the square in order to keep them even.
3.Now we calculate the radius of the semi-circles that make up the track.
This can be calculated by formula -       radius of semicircle = (length of side of square*7)/22
For a 5.5 cm square the radius is 1.75 cm.
4.Now draw a straight line across the thermocol. On this using a compass mark semicircles of radius 1.75cm.
5.MAKE SURE TO LEAVE A SPACE OF 5-7 mm OF SPACE BETWEEN THE SEMICIRCLES. This is to incorporate the
shape of the square.
6.Cut these out the track and once again tape the edges to keep them even.
7.Now you can drive your square wheel over the track.

See the wheel in action by clicking the link below
Pra_ga1 year ago
hey nice work!!
Loved the video too!!
sidgupta (author)  Pra_ga1 year ago
Thanks!!
stringstretcher2 years ago
length of side * 7 / 22???? Is that the same as PI * Length of side?
sidgupta (author)  stringstretcher2 years ago
its actually length of side / PI
dchall82 years ago
In this video a guy moves a very heavy stone with this type of device.  It happens less than 1 minute into the video so you don't have to watch the entire thing.
freakyqwerty2 years ago
I've seen this done before but using a skate board a a large track. I think it was on bang goes the theory ( a show on the BBC).
champion4663 years ago
COOOOOL!!!!!!!!!!!!!!!!!!!!!!!!