Re: Man Overboard

JBlumhorst@aol.com
Mon, 12 Apr 1999 10:56:32 EDT


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West Wight Potter Website at URL
http://www.lesbois.com/wwpotter/
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In a message dated 4/12/99 7:48:46 AM Pacific Daylight Time,
eric@winternet.com writes:

> Correct me if I'm wrong, but lifting my 225 lb self with a 4:1 arrangement
> would require 56.25 lbs of force, right? We experimented this weekend with
> the mast raising tackl, which gives 3:1. I secured one end to an overhead
> tree branch and the other end to me. My wife tried to hoist me off the
> ground, and had a difficult time of it. The 3:1 purchase would have needed
> 75 pounds of force. I'm going to rig a 4:1 to see if it seems good enough
> for her, but I think 5:1 might be the way to go.
>
> Of course, the triple block with cam cleat needed for one end of the 5:1
> system is not cheap. If 4:1 works well, I'm may just get one of those
> Garhauer vang kits for the purpose.
>
Or you could cascade a a single block (2:1) with a double block with
becket/double block tackle (4:1) for a total advantage of 8:1. Except that
the whole thing might tangle, which would slow you down in an emergency...

Judy B.