Block and tackle design - SailNet Community
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post #1 of 43 Old 03-13-2007 Thread Starter
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Block and tackle design

I made the A-frame to help me step my mast, now I'm left with what to use for muscling it up. My thought is a block and tackle, one pulley on the A-frame, the other on the bow sprit, and the tailing end of the line to the cockpit. Theoreticly I can stand in the cockpit and walk it forward as I pull while "balancing" the masts sideways action. Sounds easy, right?
Here's my question. The pulleys (doubles) are both rated at 180lbs, the 1/4 line is rated at 188. Is that heavy enough, or should I start over and get 3/8? My thinking is, even though they're only rated at 180+/-, they are quartering the load.

Dale

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post #2 of 43 Old 03-13-2007
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I used to be able to use the block and tackle on my boom vang for this goose. Does your boat have one? The nice thing is that the vang has "jaws" that will lock the line if you need to balance something our before proceeding.
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post #3 of 43 Old 03-13-2007 Thread Starter
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OK, now I'm gonna show my ignorance,,,,,LOL,, boom vang? I've read that LOTS of times and still I'm not sure what it is. There was a small block and tackle in te boat when I got her, but I can't find it now. It's around, just got mixed in with a bunch of other crap when I was mucking her out. I don;t thing it would be long enough anyway.

Dale

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post #4 of 43 Old 03-13-2007
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On my Hunter 26 I used the mainsheet as the "block and tackle". 4:1 purchase, and the cam cleat to hold it.

John
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post #5 of 43 Old 03-13-2007
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Sorry if I'm late to this topic, but do you have to be able to do this by yourself??? I assume it is a deck stepped mast???

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post #6 of 43 Old 03-13-2007 Thread Starter
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Quote:
Originally Posted by T34C
Sorry if I'm late to this topic, but do you have to be able to do this by yourself??? I assume it is a deck stepped mast???
Yes and yes.
I don't want to wait until I have a grandson or the Admiral available to go out, so yes, I need to be able to step it alone. And yes, the Venture is deck stepped.

Dale

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post #7 of 43 Old 03-13-2007 Thread Starter
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ah ha, I found the boom vang. And now I understand how it works(I love wikipedia) and where it goes,, coool. I wondered what the "loop" was for at the foot of the mast. The main is rolled up on the boom now, but I'm assuming there's a simular "loop" somewhere on it for the other end of the vang. I'll hook it up next time out.
I was right though, it's too short. The system I made is the same only much longer.

Dale

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post #8 of 43 Old 03-13-2007
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You realize the vang can be any length... depending on the length of the line.

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post #9 of 43 Old 03-13-2007 Thread Starter
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LOL, yeah I got that.
I already purchased all the "stuff" for the new one so I might as well use it. The stuff I got is heavier anyway, and I'd hate to drop the stick halfway up because of a light block.
I'm learnin' as I go, the way I like it.

Dale

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post #10 of 43 Old 03-13-2007
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Dumb question I know, but how big is the boat and how long is the mast?

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