Gin Pole

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Postby nikonsean » Thu Aug 16, 2007 6:17 pm

I'd appreciate any details (pictures tell 1000 words) on how a good gin Pole setup works for the 80. I believe we have access to most of an ultimate 20 mast so that is where we may be starting.

Sean
#340, Wet Kiss Part Deux
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Postby sdbob » Mon Dec 03, 2007 11:01 pm

We're thinking of building a gin pole just so we can put the rig up while waiting for the hoist. Have you turned that U20 mast into one yet? If you did, I'd love to hear how it worked out.

Bob Caldwell
USA 256, Sleekit
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Postby erik_wirta » Tue Dec 04, 2007 4:26 am

The French J80 class site has a nice setup online. Obviously it is in French and metric but there are drawings which are pretty easy to figure out. Here's the link: http://www.classej80france.com/Navigati ... stuces.php
Then click on 'La Chèvre' (which means 'the goat'???)
The drawings are found by clicking on the red text in the lower box.
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Postby sdbob » Wed Dec 05, 2007 10:00 pm

That is a nice setup. My only question is, where does the base of the pole sit? It's probably obvious when you're on the boat but sitting here at the computer, I'm confused. Thanks for the link Erik.

Bob Caldwell
USA 256, Sleekit
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Postby erik_wirta » Thu Dec 06, 2007 4:38 am

The side view drawing shows a base plate (wooden or fiberglass?) which follows the curvature of the deck. On the base there is a short tube with a 65mm diameter, 30mm deep. It receives the gin pole.

<img src="http://j80.org/discus/messages/5/686.gif" alt="base side view">

The o/h view shows the placement of this tube as well as a larger cutout (semicircle d=155mm) for the mast to pass thru.

<img src="http://j80.org/discus/messages/5/687.gif" alt="base oh view">

The whole rig is held in place at the base by a piece of line on each corner, and at the top of the pole by a forestay and 2 shrouds. There is no backstay so triangulate the shrouds aft. I am going to make one as soon as I find a mast....

cheers
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