Boom vang mechanical advantage question

[Brian J]

Over on another forum we've been having a lively discussion about how to determine the mechanical advantage of a boom vang. This link is to a pic of two different vang setups. The only difference between the two is the direction of the tackle is reversed. What is the mechanical advantage produced by each?
http://photos.trailersailor.com/2004/block2.jpg

Thanks in advance!

A= 8:1
B=10:1

Cheers,

MikeR

[Bob Pingel]

Both are 4:1 tackles cascaded in a 2:1 -- resulting in 8:1 for A and 10:1 for B, since B is rove to advantage.

Bob

[MikeR]

Originally Posted by Bob Pingel

Both are 4:1 tackles cascaded in a 2:1 -- resulting in 8:1 for A and 10:1 for B, since B is rove to advantage.

Bob

Hey Bob, nice to know that you agree with me. How are things with you? I'm as busy as I can be. It took a couple of years until the reputation built up but now when someone asks about someone to work on a boat, my name always comes up.

Hope things are well with you.

Cheers,

MikeR

[Brion Toss]

Hello,
A lively discussion? About that? It's sort of like having a lively discussion about the difference between, oh, 8 and 10. What kinds of things are people saying?
Fair leads,
Brion Toss

[Brian J]

This is on the Precision forum at www.trailersailor.com:

http://bbs.trailersailor.com/forums/...mes/read/22589

[MikeR]

Hoo boy, now that's lively!

Lots of opinions.

Cheers,

MikeR