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Modifications to Mainsheet Fairlead on the Phantom Yacht

Rudders Chain Plates Mast fitting for shrouds forestay Mainsheet fairlead Water proofing the hatch Improving Ballast Replacing Shrouds 'B' rig sails Radio Setup Clew/Tack Adjustment Improved sheeting system Gooseneck repair

 

Mainsheet fairlead

 

The issue here is that when viewed from the side of the yacht, the jib sheet fairlead is directly under the jib boom fitting where the sheet is attached or fed through.  The main fairlead is at least 70mm behind the equivalent position on the main boom.  This is clearly done because the area where the fairlead ought to be is the deck opening or hatch cover.  This leads to incorrect geometry for allowing the main boom and the jib boom to move out together and end up both at right angles to the hull.  A variety of methods can be employed to correct this situation.

 

 

One is to use a system of three cords and a ring adjusted so that the ring is directly under the main boom attachment point.  The disadvantage of this is its a little tricky to adjust and the ring is not supported in a vertical sense very well and can move up and down changing the boom angle.  It is easily removed providing access to the hatch area.

 

 

 

 

 

 

 

 

 

 

 

 

 

Another method is to use a solid bridle or rod with a ring at the end to feed the mainsheet through.  Again because of the hatch, fitting a rod is difficult as it would have to be angled well forward from a solid deck are passing through the deck and secured - glued - to the hull floor.  The bridle is the easiest choice made of aluminium or thin ply and secured at the deck either side of the and on the floor of the deck behind the hatch.  The one shown is ply reinforced with a layer of carbon fibre rovings on the underside.  Small self tapping screws would hold the bridle as the forces are mostly sideways.

 

 

 

 

 

In the end, the method I have settled on is to use a wooden rod held vertically beneath the sheeting position by making a small wooden dam to support the base of the rod on the hatch cover and held in place by three lines tensioned with bowsies.  A ring is used at the connection point at the top of the peg for the supporting lines and also serves as the ring through which the main sheet passes.  The top of the rod is grooved so that the ring lies firmly and the lines lead cleanly away.  This has the advantage of being easily removed from the hatch by loosening the bowsies and removing the forward line which is just looped around two of the cleat fittings in front of the hatch cover.  The rear two lines are tied more permanently to the two rear cleats so the whole fitting does not become lost and is readily replaced.  The screw cap seen in the image below allows access to a plug connected to the battery which allows it to be charged without dismantling the whole arrangement.  This is OK as the yacht no longer leaks yet allows the hull to be aired through the open cap hole.  The screw cap is from a small fruit juice bottle where the neck is cut off and glued to the hatch cover.

 

 

page last edited on 03/05/2012