In a complex system you have pulleys that move at different rates of speed relative to eachother. For example a 27:1 consisting of a clutch or MPD with 5 single pulleys and 3 prusiks. One 3:1 moves really fast, one moves at about half that speed, and the last 3:1 moves at a crawl. At least that is the easiest way i have found to explain it to people. It is fun to build one and then have the student lift a 650 lb stone with only one hand.
No, that would become a 3:1 with a change of direction at the anchor. The third pulley is a traveling pulley and if you were to make it fixed at the anchor it changes everything. Map it out both ways with the T method and you'll see what I'm talking about. Thanks for the question.
@@perryfire3006 Thank you for the reply and information. Very new to this and trying to work out a system for solo motorbike recovery when stuck. Thinking kit for 3:1 (with change of direction) and maybe for 9:1 as well. Unless you can think of any better solution? Most of the time I can see I would need to pull the rope when supporting the bike.
@@paulmattinson2109 You have so many options. Being that it's a motor bike I would assume you want to keep your kit small and compact. Look into 8 mm cord for your rope, cordelettes or dyneema slings for your anchor slings and either compact pulleys or even Petzl Rollclips for your haul system. A rope grab could be a 6 mm prussik loop or a Petzl Tibloc. They make tons of variations of carabiners and sizes but I would keep it an oval shape for the most versatility. Or if you have the space just go conventional sizing. Oh and I would definitely have the ability to upgrade my pulling capacity. With one person pulling in mud for example a 3:1 may not be enough so plan for more power. Finally if you do plan to put a change of direction pulley in at the anchor so you can pull and stabilize the bike at the same time then consider a small anchor plate to keep your equipment slightly separated which makes everything operate more smoothly. Happy riding!
@@perryfire3006 Wow, What a legend you are... Thanks for such a complete answer and suggestions. You are correct small and compact is the way I am trying to go. I was thinking about how to make the system as simple as possible. Would I be breaking any golden rules if I made my bike the anchor point (so all pulleys are close to bike) and then made a tree effectively the load, that way a 3:1 or a 9:1 would naturally terminate with the rope coming towards the bike and I wouldn't need additional rope or a change of direction pulley. Right I'm of to investigate your suggestions and melt my credit card 😀👍
A single person lifting 300 kilos is challenging but not impossible. I would use a 9:1 as a starting point. Let me think about it. Thanks for the suggestion.
Easy. Just pull the tail end and raise your load slightly and the progress capture prusik will loosen. If you want to lower the load you must keep the progress capture collapsed against the anchor pulley or else it will grab again when you reset. Cheers
I'm loving this! I'm trying to erect a deer blind platform in Louisiana coastal marsh where no equipment would survive! This may very well allow me to erect my platform without need for any type of equipment even a 4-wheeler!
It surprises me that so few hunters understand how to utilize pulley systems for hauling game uphill or for hoisting game for dressing or transportation.
If I were a deer hunter I would definitely show how to hoist a deer or up a hill. These systems work great for applications like that. Thanks for watching!
I drew a picture so people can understand better what I mean with rope line with pulleys. Even lifting and moving 200 kilos would be great. Replace the punctuations. Here is the picture httpsCOLONSLASHSLASHiDOTpostimgDOTccSLASHPf4y7Vr9SLASHropepulleyliftDOTpng
![Lp. Сердце Вселенной #60 РОЖДЕНИЕ ЛОЛОЛОШКИ [Финал] • Майнкрафт](http://i.ytimg.com/vi/YoR0pAV9FVQ/mqdefault.jpg)
Well put together, smooth, informative video. Well done!
Thanks! Happy you enjoyed the video.
You are amazing and teach so well. You have no idea how much I have appreciated your videos for rescue!
Thanks so much for the encouragement. It's a great feeling knowing you are hitting your marks. Cheers!
Nice, you’re feeding my addiction to pulleys, knots, and ropes again, but I’m loving it.
Cool. Hope you enjoy my other videos too. I've always found this stuff interesting too obviously.
This is a good idea for tight places. Thanks
For sure, thanks for watching.
Best explanation I've seen. Thank you very much for sharing 👍🏼
Glad you liked it. Cheers
In a complex system you have pulleys that move at different rates of speed relative to eachother. For example a 27:1 consisting of a clutch or MPD with 5 single pulleys and 3 prusiks. One 3:1 moves really fast, one moves at about half that speed, and the last 3:1 moves at a crawl. At least that is the easiest way i have found to explain it to people. It is fun to build one and then have the student lift a 650 lb stone with only one hand.
Yeah, the speeds are a ratio to each other too. The magic of pulleys! Thanks for watching and keep up the good work with your students.
So obvious once you see it, but I never thought of it :) . Excellent video thank you!
I try to make it simple. Thanks for watching!
Good video, helped me out greatly. Would you get the same results if you replaced the two single pulleys at the anchor point with a double pulley?
No, that would become a 3:1 with a change of direction at the anchor. The third pulley is a traveling pulley and if you were to make it fixed at the anchor it changes everything. Map it out both ways with the T method and you'll see what I'm talking about. Thanks for the question.
@@perryfire3006 Thank you for the reply and information. Very new to this and trying to work out a system for solo motorbike recovery when stuck. Thinking kit for 3:1 (with change of direction) and maybe for 9:1 as well. Unless you can think of any better solution? Most of the time I can see I would need to pull the rope when supporting the bike.
@@paulmattinson2109 You have so many options. Being that it's a motor bike I would assume you want to keep your kit small and compact. Look into 8 mm cord for your rope, cordelettes or dyneema slings for your anchor slings and either compact pulleys or even Petzl Rollclips for your haul system. A rope grab could be a 6 mm prussik loop or a Petzl Tibloc. They make tons of variations of carabiners and sizes but I would keep it an oval shape for the most versatility.
Or if you have the space just go conventional sizing. Oh and I would definitely have the ability to upgrade my pulling capacity. With one person pulling in mud for example a 3:1 may not be enough so plan for more power. Finally if you do plan to put a change of direction pulley in at the anchor so you can pull and stabilize the bike at the same time then consider a small anchor plate to keep your equipment slightly separated which makes everything operate more smoothly. Happy riding!
@@perryfire3006 Wow, What a legend you are... Thanks for such a complete answer and suggestions. You are correct small and compact is the way I am trying to go. I was thinking about how to make the system as simple as possible. Would I be breaking any golden rules if I made my bike the anchor point (so all pulleys are close to bike) and then made a tree effectively the load, that way a 3:1 or a 9:1 would naturally terminate with the rope coming towards the bike and I wouldn't need additional rope or a change of direction pulley.
Right I'm of to investigate your suggestions and melt my credit card 😀👍
I've learned something today. Very fascinating. Thank you!
Good. Happy to have helped.
Can you make a video where you lift and move something heavy(like 300 kilos) along the rope line with pulleys and just man power
A single person lifting 300 kilos is challenging but not impossible. I would use a 9:1 as a starting point. Let me think about it. Thanks for the suggestion.
@@perryfire3006 Yes its a challenge but would be cool to solve. Thanks man
Very cool video, in a situation like this, how do you remove tension if the anchor line prussik is still under load?
Easy. Just pull the tail end and raise your load slightly and the progress capture prusik will loosen. If you want to lower the load you must keep the progress capture collapsed against the anchor pulley or else it will grab again when you reset. Cheers
I'm loving this! I'm trying to erect a deer blind platform in Louisiana coastal marsh where no equipment would survive! This may very well allow me to erect my platform without need for any type of equipment even a 4-wheeler!
Good luck but make sure you use rated equipment for whatever you are lifting. Thanks for watching!
You can use also jumar in place of pursic
Yes. What is nice about rope work is that there are many options available to accomplish a goal. And it is fun learning them all. Cheers
It surprises me that so few hunters understand how to utilize pulley systems for hauling game uphill or for hoisting game for dressing or transportation.
If I were a deer hunter I would definitely show how to hoist a deer or up a hill. These systems work great for applications like that. Thanks for watching!
Very interesting I learned something new.
Good.
Would that set up have the power to uproot a pine stump?.
Depends on a lot of factors. Maybe if it is small enough but probably not.
@perryfire3006 OK maybe 8 to 1
How you release tension of this first prussik after use?
You simply raise the load slightly to release tension on the Prusik and hold it open against the pulley. Takes two hands but fairly straight-forward.
there is a little field mouse at 3:50 i think he is scared of complex systems!
Ha! You're right. It happened so fast I didn't even notice. Sharp eye!
Well you have 3 lines going to load side therefore that’s a 3 : 1 system
ua-cam.com/video/28BC_Ws_ErE/v-deo.html
Thoughts?
I drew a picture so people can understand better what I mean with rope line with pulleys. Even lifting and moving 200 kilos would be great. Replace the punctuations. Here is the picture httpsCOLONSLASHSLASHiDOTpostimgDOTccSLASHPf4y7Vr9SLASHropepulleyliftDOTpng
Thanks for watching!