The
raingutter regatta is a racing event for
Cub Scouts in the
Boy Scouts of America that is the
sailboat equivalent of the
pinewood derby. The sailboat kit consists of a seven-inch (178 mm) long
balsa wood hull, a 6-1/2 inch mast, plastic
sail, plastic
rudder, and metal
keel. Within the basic design rules, Scouts are free to paint and decorate their sailboats as they choose. Modifications for speed include the placement of the keel and rudder and the size, shape and location of the sail. A
catamaran is an exceptionally fast design, although this modification is not allowed in all races.