Saturday, May 17, 2014

Gaff and boom

The next thing was the gaff.  An eyebolt was put through the throat for clipping the throat halyard on.  A metal strap bent into a U-shape and attached to the underside of the eyebolt was used to secure the mainsail’s throat.  The head was laced to the gaff just as the lugsails of the first rig were laced to their yards, using a series of marline hitches.  Photos of these will be on the next post.

I also put on a loop of line (secured with a steel eye strap on the underside of the gaff) where the peak halyard will be clipped.  This method of securing rigging with loops of line going around the spar, rather than using fittings simply screwed into it, was repeated throughout: the shrouds and forestay, the throat halyard block, the mainsheet blocks, the topping lift and the boom vang.

Next came the boom.  The foot of the sail is secured to the boom at the tack with a pin.  A gooseneck screwed to the mast enters the fore end of the boom.  The epoxy-reinforced glooseneck hole in the boom has a mouth with square cross-section to ensure a tight fit and no twisting.  Both are seen in the first photo.  
At the clew there is an outhaul line that runs through the aft end of the boom past a sheave and is secured with a clam cleat.  This plus the topping lift, which clips anto a loop of line, are shown in the second photo.
The third photo shows the boom vang.  It starts with a running bowline secured to a wooden cleat, runs through a block tied to the boom, and ties off on a horn cleat.  The boom vang will keep the boom on its goose neck, and stop the boom from lifting when sailing downwind, something that gaff sails are prone to.

Tomorrow if all goes well I will put in halyard and sheet cleats and try out the new running rigging. 


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