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many pulleys at various angles multiply the initial power of the winch
How Do Pulleys Multiply Force in Complex Systems?
- Thread starter Ranger Mike
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Pulleys can significantly multiply the initial power of a winch when arranged at various angles, enhancing lifting capabilities in complex systems. The "cat's cradle" technique is rarely utilized due to the scarcity of anchor points for snatch blocks, especially near highways. This method proves effective in challenging scenarios, such as recovering heavy vehicles that have sunk or rolled over in forested areas. The discussion humorously notes the ineffectiveness of using a bulldozer for extraction, highlighting safety concerns with tensioned cables. Overall, the conversation underscores the practical applications and limitations of pulley systems in recovery operations.
many pulleys at various angles multiply the initial power of the winch
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Baluncore
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The "cat's cradle" technique is very rarely seen due to the lack of anchor points for snatch blocks near highways. It really comes into its own when a heavy vehicle sinks, or rolls over, in a forest.Ranger Mike said:
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berkeman
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Wow, very impressive. I like how they said they tried pushing it out with a 'dozer and that did not work, and then later in the video you can see the back of the truck with big letters "DO NOT PUSH". LOL 
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DaveC426913
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Man, guys just blithely walking in and amongst those tensioned cables...
Anybody seen Ghost Ship?
Anybody seen Ghost Ship?
This is question for fluid mechanics.
Static pressure in the exhaust manifold(turbo car engine) is usually 1.2 to 2.5 times higher than the boost pressure(intake manifold pressure).Boost pressure is around 1bar guage pressure(2bar absolute).
Can the local static pressure somewhere inside a turbine housing ever be lower than atmospheric pressure, is this possible?
here some links where CFD is used...
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