Hydrodynamic Analysis on Saillng (5th Report) : Aerodynamic Forces and Moments Acting on Sails

Abstract

This paper consists of the following four parts; 1) Sail camber as well as twist were measured for two sloop rigs and the effects of these two on sail performance was examined. 2) Comparisons were made with data of vertical wind velocity distribution and how the distribution on sail performance is affected. 3) Through a technique of using carriage of towing tank, model sail tests were performed and the aerodynamic center of pressure of sails was investigated. 4) A way to estimate sail performance was showed through above mentioned data.