Fibonacci Wheel with Skate Bearing

cults3d

Wheel designed for a Cub Scout/Boy Scout Dirty Derby Race. Gravity ramp started at about 20ft and had a jump. Cars were allowed to be 4" wide x 6" tall x 18" long and weigh up to 12lbs. Mine weighed in at 5lbs. The wheels should have been installed directionally, but I did not and they held up just fine. I ended up winning first in the Cub Scouts and 2nd in the final 4 against 2 Boy Scout cars and the 2nd place Cub Scout car. The Cub Scout car that I beat originally beat me for 1st overall. The bearings used for this were 608-2RS Skateboard Bearing, Rolling bearings, 8x22x7 from Amazon. I designed a channel for a snap ring, but the ring ended up rubbing the shaft, so I ended up glueing the bearings into the wheel.