Speed Demons

By: Tommy Davis

Our goalOur goal is to have a gravity powered racer to go at a very minimum of 3 metersThe gravity cruiser eventually went six meters

Design FeaturesTwo large wheels at the back.Two small wheels at the front.Completely symmetricalFulcrum put at ¾ up the supportFulcrum support beam at 1/3 of the back of the beam

Helping to meet the goals

We used extra weight to make sure that it would pull the string as fast as it can.The weight made it front-heavy so we put two symmetrical penny containers on the back.Three containers of pennies as the weight on the fulcrum.Support beams made out of leftover materials

TroubleshootingWe had our beam to far front in the beginning and there was not enough string to pull the axle/spin the wheel.The tower was leaning forward and making it fall so support triangles were added to the front and sidesOur cruisers fulcrum snapped so we wrapped it all in tape, which provided sort of a brace so that it wouldn’t bend.The weights in the back of the cruiser made the back wheels have friction

Meeting Our GoalsIn the end the modifications allowed it to go 6 meters. However at the last minute the bracing failed halfway and we had to entirely replace the fulcrum and did not have time to fine tune it to its original 6 meter distance