[quote=Edchris177][quote]In a H16 the tension in the rig is established by the downhaul of the jib line. The forestay is slack.[/quote]
Different horse the Nacra is. When I first picked up my 5.7 I took tons of useless pictures. Occasionally one of these proves useful!
In the photo below look at the top right. You can see 3 swagings, & 2 of the three thimbles. The top & bottom thimbles (or left & right if you visualize the mast being vertical) are shrouds, going to the respective chain-plates on the hulls. The center one is the fore stay-that will go down to a 10 hole adjuster that connects via a shackle to the two bridal wires,(one from each hull) forming an inverted "Y". The thinner wires you see are for the double traps.
[img]http://www.thebeachcats.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=79274&g2_serialNumber=3[/img]
The mast rake is set by moving the fore stay up or down in the 10 hole chainplate. (I borrowed that photo, note it is rigged wrong, the bridal wires should be inside the chainplate to properly distribute loads).
The rig is tensioned by setting the mast rake,(as above) then set one shroud in the appropriate hole (again each shroud connects to a 10 hole chainplate). Have a buddy pull on a trap wire, or put on a harness & hang from the wire while you set the second shroud. Voila, you now have the rig tensioned & the jib is still sitting at your feet.
[img]http://www.thebeachcats.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=79277&g2_serialNumber=3&g2_GALLERYSID=fc428197031cf4b4dd20bbefab9a8879[/img]
Now observe the wire that goes around the block attached to the mast. That is the jib halyard, with block attached,(I think this is the setup you have). The top of jib will attach via a shackle to the end of the wire at top left of photo. As you haul the jib up, you zipper it up as it slides UP the forestay. The tack of the jib is then attached to the jib hanger (it is hanging down in the bottom photo, you would rotate it upwards & attach jib). Now you will tension the jib independently of the rig. With the jib raised, the block with becket (left center of top photo) will now be near the base of the mast. You raised the jib with the long line attached to the becket. When the line was attached, it was done so as to leave appx 2 feet of length as a trailing end. This does not show in the photo. Visualize a 25' line, tied to the beckett so as to leave a 2' tail. Comprende?
Once you raise the jib, take that 2' end & run it through the appropriate strap eye on the mast, back around the pulley, then through the jam cleat on the mast to hold it. This gives 3:1 to tension the jib. You don't need to tension it like a piano wire, you're not in the Worlds with an old 5.2, just take the wrinkles out of the jib, then stow the halyard in the tramp pocket.
All that's left is to attach the lines from the jib blocks, see the manual for this if in doubt. These photos & more are in my album under members 1984 Nacra 5.7 Click on photos in post to get full size.
Hope this works for you.<!-- editby --><em>Edited by Edchris177 on Feb 08, 2011 - 04:28 PM.</em><!-- end editby --> [/quote]
