I just added a Furlex roller furling system to my 1986 Hunter 31. I was hoping to put a 150 genoa on, but unless I have done my measurements wrong the 150 won't fit. I had a 155 racing sail before, but that was at deck level. Has anyone with a Hunter 31 managed to fit a 150 genoa on the boat with roller furling? Am I measuring something wrong? I measured back 18 feet from the bow (the J is 12 ft.) and assumed a two foot clew height. Based on this I ran out of track for the proper position of the sheet. Help Bill
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I THINK THE MEASUREMENT IS WRONG
Bill, If I understand sail measurements correctly, I think that the % overlap is measured from the luff perpendicular, not the foot of the sail. The 18 ft measurement should be made from the clew of the sail to the headstay, intersecting the headstay at a perpendicular angle. This would give you a measurement on the deck of approximately 19 feet and some change (use trigonometry to find the exact measurements). Also keep in mind that where the sheet goes to depends also on the cut of the sail, and from sail to sail, the leech measurement and foot measurement may be different. In other words, two different '150's for a given boat may have completely different dimensions, but still be a true 150% sail because the combination of leech and foot measurements will still give you a luff perpendicular of 18 ft (150% of J). Also, do not forget to take off from the luff measurement of the sail for the roller-furler hardware. I know it is about 22 inches for the CDI FF6 furler, and sometimes more or less for the other manufacturers. So, you may need to get the sail cut down a little to make it fit. I just installed a roller furler and new headsail on my H 27. Hope to sail it soon... Good luck.
Bill, If I understand sail measurements correctly, I think that the % overlap is measured from the luff perpendicular, not the foot of the sail. The 18 ft measurement should be made from the clew of the sail to the headstay, intersecting the headstay at a perpendicular angle. This would give you a measurement on the deck of approximately 19 feet and some change (use trigonometry to find the exact measurements). Also keep in mind that where the sheet goes to depends also on the cut of the sail, and from sail to sail, the leech measurement and foot measurement may be different. In other words, two different '150's for a given boat may have completely different dimensions, but still be a true 150% sail because the combination of leech and foot measurements will still give you a luff perpendicular of 18 ft (150% of J). Also, do not forget to take off from the luff measurement of the sail for the roller-furler hardware. I know it is about 22 inches for the CDI FF6 furler, and sometimes more or less for the other manufacturers. So, you may need to get the sail cut down a little to make it fit. I just installed a roller furler and new headsail on my H 27. Hope to sail it soon... Good luck.
Too large if it is your only sail.
Bill: I think that a 150 is too large of a sail for a furler if it is your only sail. This sail is not going to have very good shape and trim when furled.
Bill: I think that a 150 is too large of a sail for a furler if it is your only sail. This sail is not going to have very good shape and trim when furled.
Steve, if you tell your loft what you want the
sail to do, the shape should be acceptable when reefed. Roller furling is designed for only two things; simple stowage of the head sail and reduction when the wind pipes up. I've heard the pundits tell us to plan on carrying a full inventory of head sails because rolling up a sail won't yield optimum shape, or some such BS. I've read that we should strike the 150 genny and hoist a jib for,,,what?,,,shape? When the wind comes up along with the seas and we are out pleasure cruising, who in the hell is going to drop the 150 to the deck, stuff it below and hoist the 'proper sail'? Who does that? 'Nuff said.
sail to do, the shape should be acceptable when reefed. Roller furling is designed for only two things; simple stowage of the head sail and reduction when the wind pipes up. I've heard the pundits tell us to plan on carrying a full inventory of head sails because rolling up a sail won't yield optimum shape, or some such BS. I've read that we should strike the 150 genny and hoist a jib for,,,what?,,,shape? When the wind comes up along with the seas and we are out pleasure cruising, who in the hell is going to drop the 150 to the deck, stuff it below and hoist the 'proper sail'? Who does that? 'Nuff said.
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