How Do Pulleys Multiply Force in Complex Systems?

AI Thread Summary
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.
Ranger Mike
Science Advisor
Messages
2,443
Reaction score
427


many pulleys at various angles multiply the initial power of the winch
 
  • Like
Likes Lnewqban, jack action, berkeman and 2 others
Engineering news on Phys.org
Ranger Mike said:
many pulleys at various angles multiply the initial power of the winch
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.
 
  • Like
Likes Ranger Mike
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 :smile:
 
Man, guys just blithely walking in and amongst those tensioned cables...

Anybody seen Ghost Ship?

1710341615054.png
 
Posted June 2024 - 15 years after starting this class. I have learned a whole lot. To get to the short course on making your stock car, late model, hobby stock E-mod handle, look at the index below. Read all posts on Roll Center, Jacking effect and Why does car drive straight to the wall when I gas it? Also read You really have two race cars. This will cover 90% of problems you have. Simply put, the car pushes going in and is loose coming out. You do not have enuff downforce on the right...
Carburetor CFM A Holley Carb rated at 500 cfm 2 barrel carb has venturi diameter of 1.3/8". There are 2 barrel carbs with 600 cfm and have 1.45 diameter venturi. Looking at the area the 1.378 bore has 5.9 sq. Inch area. The 1.45 dia. has 6.6 sq. inch. 5.9 - 6.6 = 0.70 sq. inch difference. Keeping the 500 cfm carb in place, if I can introduce 0.7 sq inch more area in the intake manifold, will I have the same potential horsepower as a 600 cfm carb provide? Assume I can change jetting to...
I'm trying to decide what size and type of galvanized steel I need for 2 cantilever extensions. The cantilever is 5 ft. The space between the two cantilever arms is a 17 ft Gap the center 7 ft of the 17 ft Gap we'll need to Bear approximately 17,000 lb spread evenly from the front of the cantilever to the back of the cantilever over 5 ft. I will put support beams across these cantilever arms to support the load evenly
Back
Top