Re: a practical physics problem with pulleys

[Tom Ford <tomford@THESCIENCESOURCE.COM>]

Leigh,

Rather than answer your question, let me provide a solution. In our coastal
community, large mesh netting is not hard to find. Using hooks or staples
along the rafters, make a saddle of netting and slide the canoe into it.
Usually one person can do it alone, and this way you can stow it with the
paddles, lines, and gear still in it. I don't have a canoe, but I have
stored a two-person and a four-person foam sailboat that way for years now.
Part of the problem with using a tackle is that it takes up room above the
canoe unless you want to use a winch and steel cable with very sturdy sheaves.
Tom Ford

At 02:30 PM 7/27/99 -0700, you wrote:
> I have a domestic problem which the group here might help me with.
> I want to raise an inverted canoe to a place between two rafters
> under a horizontal carport roof using ropes and pulleys affixed to
> the rafters. I am sure there is some clever rigging that will
> allow me to do this with great ease and elegance. For example, I
> would like to do it with a single rope if possible. It is difficult
> to imagine any rigging that does not provide a mechanical advantage
> of two, but a greater MA is desirable. Oh yes, the rope can slide
> over the canoe gunwales. They are hard, smooth plastic.
>
> Does anyone know of a book on rigging? where do I look in the
> library?
>
> Leigh
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