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jib track blocks

To: "Warren Stevens" <warren@xxxxxxxxxxxx>,<swiftsolo@xxxxxxxxxxxx>
Subject: jib track blocks
From: "Mark White" <Mark@xxxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 23 Nov 2005 22:27:54 -0700
Warren,

First put packing tape on the deck and down the steps where you are working. I 
took a piece of leftover material from the mainsheet cam base material and cut 
2 rectangles, and tacked to the packing tape on the deck in the correct 
position, with hot melt glue.  Cut the jib track so it has 2 1/2" resting on 
each side of the wing.  Take packing tape and carefully cover the ends of the 
jib track, pressing into all the angles and wrap around the ends.  Stack 2"x 4" 
blocks or whatever and some shims in the center of the deck to get the angle 
set and to balance the track.  The angle is in the errata, if I remember 
correctly, use the 2 holes in the middle of the track for alignment.  I 
inserted a 3/16" rod into one of the holes, couldn't see the hole itself, and 
align to a point 36" vertically over the bow fitting, I raised that point to 36 
1/2" since the track was raised 1/2".  Tape the blocks together so they don't 
shift. Hot melt glue a block on each wing (covered with packing tape), with a 
tab that fits into the track to hold it in position fore and aft and to form a 
dam, and glue a block on the track on each side to hold the track in place p&s. 
 mix some epoxy and high density filler with some chopped fiberglass cloth 
(1/2" in length), peanut butter consistency, and fill the underside of the 
track.  Press down onto the rectangles tacked to the deck, and finish filling 
under and all around to achieve the desired shape.  You might want to add some 
graphite powder to the mixture to keep from sanding through the finish, if you 
want it black.  Snap them off  the track when cured, and sand, fill, and 
finish.  There is room for the righting line to pass through the block under 
the track (remove track first, it will be slightly in the way of your hole when 
drilling, but not enough to block the line).  I'm sending 2 pictures now and 2 
more separately.  If you have any questions just ask.  The position of the 
track from station 0 is on the deck plan, but Bram said to move it aft 1/4" to 
compensate for the extra 1/2" of height.

Sincerely,

Mark

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