Rod Carr, Carr Sails
20090409
attaching sails
figure-8 cross section shaped sail slides one half of which
that slides into the bolt-rope track, while the other half protrudes to hold a
jackwire just aft of the after centerline of the mast. One brand that
seems to fit many masts is: High Seas Offshore Rigging Components – Mini
Double Copper Sleeves, Size A2, 2 mm ID (MDS-BK-A2/100). They are
available online from deep sea fishing suppliers. The sail then swivels on
the jack wire and doesn’t stream aft for a distance like the bolt rope
arrangement, making the mast appear fatter to the oncoming wind, and thereby
reducing form drag and upping sail efficiency. Sail lifetimes are greatly
extended when the sail sits on the wire rather than being point loaded a
discrete “bead” sewing locations.
