Forums: Climbing Disciplines: Big Wall and Aid Climbing:
Ask Dr. Piton....about Chongo's 2:1 Hauling Ratchet
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erdeneruc


Nov 24, 2003, 3:04 PM
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Registered: Aug 14, 2002
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Re: Upcoming Tech Tip [In reply to]
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http://www.rockclimbing.com/...p.cgi?Detailed=21097

The scale attached to the top pulley on the left in this picture should read 100 lbs.

Else, I agree that it provides a 2:1 mechanical advantage.

Erden.


erdeneruc


Nov 24, 2003, 3:16 PM
Post #77 of 79 (20969 views)
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Re: Upcoming Tech Tip [In reply to]
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Oh, and if we want to be that accurate, "if these two anchor points were clipped into one MASTER POINT, it would total 150 lbs."

NOT 100 lbs as the illustration suggests.

So make sure that your "master point" can support the weight of the pig AND your weight before you lean away on that haul line.

Erden.


mikeinidaho


Nov 25, 2003, 6:10 PM
Post #78 of 79 (20969 views)
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Registered: Apr 19, 2003
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Re: Upcoming Tech Tip [In reply to]
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Yes -Yes... The folks who review my drawings have a sharper eye for facts than I do...

It'll be updated soon... and I'll use your corrections.

Pulley facts tend to be complicated by my inabilaty label 'em properly...

M!


mikeinidaho


Nov 27, 2003, 3:37 PM
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Stolen Art! [In reply to]
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HEY!

I recognize those cartoooons!!!!

This is in reference to the PULLEY diagrams way back in this posting frenzy (on"page" one, posted by: WiggleStick; Nov. 15, 2001) - Check 'em out, this series shows a buncha pulley systems and various configurations, enough to make one's brain hurt!

Stolen from David Fasulos SELF-RESCUE book, with some anchor additions!

My lawyers are now un-leashed!

M!

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