More rope mechanical advantage: the 7:1

[@340wbymag]

Your videos are wonderful! I don't believe anyone I know understands how pulley systems work, or how to use them, and I am utterly fascinated with pulley systems. I hunt every year, and I carry lots of rope and pulleys, just HOPING I'll have the opportunity to haul a big animal up a mountainside. I have studied the methods used to haul victims in vertical and high-angle rescues for a long time, and all of it can be put to use when hauling game or just moving heavy objects. It just fascinates the heck out of me.

[@perryfire3006]

Thanks! Happy you are enjoying the videos. Good luck on the hunt!

[@raymondcava4669]

Thank you for posting, I’m starting to understand how this all works. I have no real application for all of this but it’s interesting to watch they see the mechanical advantage.

[@perryfire3006]

Good. If you watch my whole series on MA it should make things much clearer as you will develop building block recognition and patterns. Thanks for watching!

[@mariascott3319]

​@@perryfire3006What is ma

[@zoobiewa]

Where can you buy triple sheave pulleys? I've been looking but can't find anything that looks like it could hold much tension.

[@perryfire3006]

CT Climbing. Name of the pulley is Orbiter. Good luck

[@robertducat-qp7qy]

Where do you get those triple pulleys please?

[@perryfire3006]

CT Climbing. Name of the pulley is Orbiter. Good luck

[@bowlineobama]

I don't see 7:1. How are you adding the Tensions?

[@perryfire3006]

On which example? What are you coming up with out of curiosity? I should probably do a followup video showing how it all adds up.

[@alexeisenhardt9299]

Nice

[@perryfire3006]

Thanks!

[@seanrhone5306]

Something I've never understood, maybe you can answer. Let's say you're lifting a 1800lbs, using the 7:1 shown here. Do the blocks have to be rated for 1800lbs or less, since the advantage?

[@perryfire3006]

The 1800lbs never weigh less than 1800lbs. The mechanical advantage only facilitates using less than 1800lbs to lift the weight. So yes, your equipment has to be rated for whatever you are lifting, even if your effort is less. Cheers

[@robertducat-qp7qy]

Sir, thank you so much Wish you could see what I am getting ready to do now. Unload a wood splitter from the back of my wife's pickup on a 9:1.

[@perryfire3006]

That would be cool to see. And thanks for the encouragement, much appreciated!