Commemorative issue 1973 Summer & Winter Olympic Games
A fast and dangerous sport, bobsledding involves two or four persons who maneuver a bobsled down a winding ice track. Most bobruns are in the Alps or at sites of former or upcoming Olympic Winter Games. International competitions are controlled by the International Bobsled Federation. Most European countries conduct national championships. Bobsleds are sleek, streamlined vehicles typically made from aluminum and steel. They travel up to 90 mph (145 km/h). International courses are at least 4,920 feet (1,500 m) with at least 15 banked turns.