Here are a list of websites to help you better understand building your Pinewood Derby car.
www.youtube.com -search "building pinewood derby car"
http://www.boyscouttrail.com/library/pinewood-derby.asp
http://home.simplyweb.net/bosworth/howto.htm
http://www.pinewoodpro.com/pinewood-derby-howto-design.htm
http://scouting.org/scoutsource/CubScouts/Cub%20Scouts/ThingsToDo/PineDesign.aspx
Pack 225 Pinewood Derby-Saturday, May 3rd 2pm