Thursday, March 22, 2012
Aerodynamic shape around a free standing spar and a partial solution.
Over the years, I have adopted many options. The track on the mast and a sail without battens is the simplest but worst scenario. Next, the track on the mast with battens is an improvement, however, track on the mast with full battens is the best normal set-up. I have also tried a "Thick" sail with foam inserts, as well as wing mast and full battens. This is certainly a valid system but is complicated and expensive. On the original 40' Freedom Cat-Ketch, Gary Hoyt adopted a double ply sail going around the mast. The result was producing too much friction, causing difficulties hoisting, lowering and reefing the sail. I propose another solution; the "SockSail" and I am using the Ocean Going Volkswagen 37 to illustrate.