That's funny Holmen, but I do remember posting a lot about MA in the past over at treebuzz. Handbook of Rigging is a great resource and that quote that The Art and Science of Practical Rigging has as the beginning pretty much sums it up...both good books.
Al, like you said, it's all basic high...
Rigging work is my favorite part of tree work and I love the engineering principles behind mechanical advantage. Below is a link to Brion Toss' Fairleads archives and a short article on "how to get power from a pulley". It is by far the best discription of mechanical advantage that I have found...
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