i know bigger wheels are better for distance (which is what i'm aiming for). is it better to have bigger wheels for the rear wheels, and a different (smaller) size in the front? what is the reason for this?
and. any ideas on what to use for the back wheels that are bigger than cds, but smaller than records?
also. are there any sites with some design ideas? i have tested it with just a rubber band connecting the axles, and it works fairy well. but it seems too simple and unoriginal.
2007-03-02 13:58:00 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Use hula hoops for the wheels. Put a thin bead of hot glue around them for traction. Attach a 3 or 4 foot piece or wooden dowel rod to the axel at 90degree and let it drag. You wont even need another set of wheels. It'll scream!!!
2007-03-02 15:00:18 · answer #1 · answered by The Bellman 1 · 0⤊ 0⤋
Hi. You will have to consider traction as well as diameter. Spinning a large wheel does no good for speed or distance. Rubber has good traction so an elastic covering the O.D. may help. Also you need to disengage the drive mechanism when the energy of the rubber band is gone.
2007-03-02 15:02:22 · answer #2 · answered by Cirric 7 · 0⤊ 1⤋
Small front wheels would help the car's acceleration (less rotational mass to overcome), but larger wheels would assist with increasing distance (greater rotational momentum).
You might try the plastic lids for resealable large jars or cans for the rear wheels.
Best wishes and good luck.
2007-03-02 14:26:14 · answer #3 · answered by Doctor J 7 · 0⤊ 0⤋