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Jan 11 2007 - 0842 PST - By Matthew Sheahan - Further up the mast jumper struts and their stays are popular areas for development. The primary role of the jumper struts and its stays is to support the top mast, both laterally and in the fore and aft directions. Changing the fore and aft angle that the jumpers are set at alters the amount of bend in the top mast which in turn changes the leech profile of the mainsail. Clearly the ability to be able to swing jumper struts fore and aft is important, but the new style overlapping headsails have made this requirement even more crucial. In order to sheet the headsail fully home, the leeward jumper strut needs to be cranked aft to move the leeward jumper stay aft and keep it from fouling the genoa leech. Photo Patrick Gripe

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