Sail-board reefing frame - has sail wound mast and held by hinged catch opened at ends

摘要

The sail reefing frame may be applied to sailing vessels or sail boards. It enables a single sail to be used in any weather rather than requiring the purchase of up to four sails. The system consists of two hinged semi wishbones opened at the outer end. The sail may be reefed by rolling onto the mast. The wishbone is clamped onto the mast.