Resources
http://www.gsu.edu/other/timeline/mech.html
http://members.aol.com/jeff570/a-f.html
http://www.geocities.com/CapeCanaveral/Lab/3550/cycloid.htm
http://www.scas.bcit.bc.ca/scas/math/entrtain/coaster/t_brach.htm
http://www.seanet.com/~ksbrown/kmath087.htm
http://www-groups.dcs.st-and.ac.uk/~history/Curves
http://www.best.com/~xah/SpecialPlaneCurves_dir/specialPlaneCurves.html