Join Date: Nov 2008
Location: Deale, MD
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I fitted a 2:1 halyard on my last boat; though only a 40-foot mast the main used a bolt rope and could be fiddly to hoist. I changed from wire to fiber a the same time.
Unless your main truely hits the mast head when raised no special shackle is needed. Simply fix the end of the rope to a shackle at the top of the grove and add an ordinary block (perhaps one size smaller than the line size would call for) to the headboard. The load on the this block is signifigant but steady. I used a bullet block while tensioning the high aspect main with an 8:1 mainsheet. Larger boat = larger block.
Make certain the block has smooth edges; it will chafe the halyard at full hoist. Knoting is preferable to splicing as the splice would have to go through the block and a knot is much shorter. Yes, the mast must be climbed, but only once every 5 years, when I hope it would be climbed anyway. The halyard may be down sized, as the load is now 50%. Compression on the mast is also reduced. Yes, there is more line, but I think you will find you no longer use the winch, so it goes very quickly.
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