Wind surfing board with float - has hinged pivot point connecting base of mast to centre plate

摘要

The wind surfing board has a float which carries a tail fin and a base (g) for the mast. The mast is hinged at the base (r) and has a sail (CV) attached to the mast and spread by means of a wish bone. The dagger board (cd) is hinged on the float at the point (a). The top of the dagger is connected to the base of the mast by a card (c) which acts against the spring (s). The mast and dagger move in opposition to each other.