Join Date: Jul 2012
Location: Nr. Southampton SO45 1XL
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Re: Galvanic corrosion - sail slides
Can I add a comment ? In Aluminium masts with rectangular slots, jamming has always been a problem. The Rolls-Royce solution is the Harken system, which makes use of an aluminium, black anodised, track with a groove on each side. The track slides up the slot in the mast. ( The mast has to be unstepped, and the boom attachment and mast heel fitting removed, usually. The slides are re-circulating balls ( delrin ). Attach the sail with bronze or nylon shackles - do not sew onto the slides - because the slides stay on the mast. Trying to remove results in escaped balls - nightmare, v expensive. No jamming, sail drops instantly. Particularly if you use a 'dutchman' system ( eyelets in mainsail, so sail drops in neat folds. ) Lazy jack / sail cover catchers are more common in Europe, but get tangled hoisting. OR - use Proctor slides, ( best, because strong and no corrosion problem ) which are Stainless Steel, encapsulated in Nylon. Use with Silicone grease, obtainable in toothpaste size tubes. Plastic ( nylon or similar ) suffers from breakage aloft owing to UV + strong winds. To replace means taking whole sail out of groove - not easy with a boat like mine ( 45'). OR mill slides to suit your mast out of Glass Filled Nylon to a pattern similar to the ALLSLIP design, which has a running surface in both the inner and the out surface of the slot, like a letter 'H' ( H--) To attach the shackle, drill after milling. Use Black compatible paint to cheat UV light degradation, or Black GFN. For the ready-made items, Bainbridge International supply: East coast tel=1-781-821-2600, fx= 1-781-821-2609 West coast tel= 1-714-373-3322, fx= 1-714-373-3326 There are other solutions, but these best ( Harken ) or most cost effective ( Proctor type ) I have same problem myself - will post another message when I have solved mine. I prefer the idea of Dutchman sail gathering to lazy jacks, but sail covers less easy, also sail wear and air flow a problem, and corrosion of guide wires and UV degradation of coating. ( I take it all know dutchman system - vertical coated wires thru' eyelets in mainsail, so sail drops in a slatted pattern. ) I use lazy jacks, but stow them under way; and use a separate sail cover, very basic and cheap to renew. Hope this helps a bit.