
Sail Performance, based on C A Marchaj`s classic Sailing Theory & Practice, has established itself as the standard work on the subject & is now acclaimed as a milestone in sailing literature. From wind tunnel tests which he has conducted, Tony Marchaj describes how the factors of wind speed, sail area, sail shape, sail setting, the hull, angle of heel, wind gradient & steadiness of the wind all affect sail power, & why certain rigs are superior in power & efficiency to others. Sail Performance is a major work which is acclaimed for its analysis of the factors that contribute to an efficient sailing rig. ` Should be on the bookshelf of every serious amateur & professional sailor` Nautical Magazine