Addtional sheave/block at masthead? - SailNet Community
 
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post #1 of 4 Old 05-31-2013 Thread Starter
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Addtional sheave/block at masthead?

I have a fixed boom top lift. I'd like to change it out to a "real" top lift. What are the options to adding a block at the MH ? My current housing has cross-head/dual wire sheaves and I don;t believe I'd like (the expense) to change that out.

Add a saddle bracket and loop for hanging a shackled block?? THere *may* be a tabbed bracket existing for the one on now...simply add a block to it?
I'd like the option to use the lift to haul up the top of a boom tent and hold the boom as a crane jib when lifting heavy items aboard; potentially to 350#s ie; motor r/r?, dink lift.

TIA,
Paul

S/V Chrysalis
'80 Watkins 27
North East, MD

Last edited by deltaten; 05-31-2013 at 08:20 AM.
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post #2 of 4 Old 05-31-2013
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Re: Addtional sheave/block at masthead?

Are your halyards external now? ie does the main cross both sheaves and come down the front of the mast and the jib the opposite? If so you could free up a sheave for a TL by making at least the jib halyard internal..

Otherwise if you've got a web or a strap that could take a block that should be fine. If you intend to hoist such loads, though, your topping lift will have to be beefier than normal.

Another alternative adjustment is to put a short 3-4 part tackle on the last few feet of the fixed TL and adjust its length there, at the boom end.. the bitter end could be run along the boom so as to be reachable from the boat at all times.

This diagram from the W32 site..


Ron

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".. there is much you could do at sea with common sense.. and very little you could do without it.."
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Last edited by Faster; 05-31-2013 at 09:43 AM.
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post #3 of 4 Old 05-31-2013 Thread Starter
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Re: Addtional sheave/block at masthead?

Faster;
Yes... external, wire-to-rope, crossing the head/opposing. TL probably 3/16 s.s. vinyl covered cable. Good idea for the last few feet! Saves me from either dropping or climbing. Thanks

S/V Chrysalis
'80 Watkins 27
North East, MD
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post #4 of 4 Old 06-01-2013
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Re: Addtional sheave/block at masthead?

What faster has suggested is what I have. It's a smart setup an saves a line going all the way up and back down the mast.

On the other hand, a traditional topping lift makes a great spare mainsail halyard if you loose the first one.

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