Mark has given you some good advice, IMO. (But I wrote this a while ago but never sent it, so I'll send it along even though Mark has already covered most of it)
1. For a 150% genny: 1.5 times the length of the boat = 40 feet (plus a 2-4 feet extra if you plan to put eyes at the end). For a 110% Jib = 1 boat length. 2. The height of the eye depends on the height of the clue. Set your whisker pole set to about 135% of the J of your boat. On a windless day, unfurl the genny and wing it out. The clue gets higher as you pull the genny out. Hold the pole horizontal. Mark the place on the mast and install the eye. 3. The height of the exit depends on how many lines you have and where the crew will handle them. Our halyards and reefing lines run aft to the cockpit. Our spinnaker halyards and pole lines are handled at the mast. a) On some boats the lines exit the mast down near the base of the mast and go to turning blocks, and then aft. That's not my favorite way to do things. b) On other boats, like mine, the lines exit the mast at staggered heights 7-10 feet above the deck. That way you can grab them to hoist the lines or sweat the lines at the mast if you need to in an emergency. All the lines on my mast exit above my head, including the ones that are run aft to the cockpit. c)On my boat, the spinnaker-associated lines are handled at the mast, not run aft, so they exit pretty high up. There are cam cleats and clam cleat behind spinny lines so the mast-man can secure them while hoisting. There are a bunch of pictures about how I rebuilt my mast. I had to plan the exits for the lines carefully so they don't conflict. There's some information about the planning process for where and how the crew will handle lines. After you decide how you want the crew to handle lines, you can place the exit holes. Good luck http://www.blumhorst.com/catalina27/RiggingDesign.htm I'm sure others on the list will add to what I wrote. That's all I can think of right now. Gotta go -- my 7 year old kid is banging on my piano. Fair winds, Judy B 1977 ________________________________ From: Joe <[email protected]> To: [email protected] Sent: Sat, April 17, 2010 8:39:45 AM Subject: [IC27A] Jib Sheet Lengths and other rigging questions How long should the jib sheet be for a 1984 standard rig with a roller furling and a 135 jib? I am also installing a whisker pole eye...what is a good height for a single point attachement? I am also converting to internal halyards where (what height from the mast base) should the exit blocks be located? Thanks - Joe
