Like your videos. Nice system. I use 2 skylotec orbiter H and prusiks to create a similar system with 1 to 7 mechanicle advantage. 65% less money to spent, but even a little less comfort. Greetings from the Netherlands
Yeah that Petzl Twin Release setup is pretty cool. Was $315 when I got it on sale, so still spendy. I use the Petzl Spin L1D pulley all the time to lower small stuff by myself. Also liking the Petzl Rescucender.
This is brilliant. I’m wondering why when you swapped the pulleys around, how you got an extra 1 mechanical advantage from it? Nothing had changed but position.
Rather than having 4 legs of rope pulling the load, when it gets flipped around, now 5 legs of rope are pulling the load. It also helps when the T-Method is used to count your units of tension in figuring out "how much" mechanical advantage there is. Basic run down: when someone pulls on the haul leg of rope, a unit of tension is input. That unit travels up the rope and around the sheave; which now that sheave sees two units of tension. The single unit of tension continues to travel through the rope, reaching the other sheave repeating the process; so now that sheave also sees two units of tension (4:1). When we flipped the pulleys around, there is a leg of rope locked off at the becket of the Twin Release, that single unit of tension continues to travel until it reaches that stop, effectively proving a 5:1 mechanical advantage. This would be considered a SIMPLE System.
Like your videos. Nice system. I use 2 skylotec orbiter H and prusiks to create a similar system with 1 to 7 mechanicle advantage. 65% less money to spent, but even a little less comfort. Greetings from the Netherlands
Yeah that Petzl Twin Release setup is pretty cool. Was $315 when I got it on sale, so still spendy. I use the Petzl Spin L1D pulley all the time to lower small stuff by myself. Also liking the Petzl Rescucender.
This is brilliant.
I’m wondering why when you swapped the pulleys around, how you got an extra 1 mechanical advantage from it? Nothing had changed but position.
Rather than having 4 legs of rope pulling the load, when it gets flipped around, now 5 legs of rope are pulling the load. It also helps when the T-Method is used to count your units of tension in figuring out "how much" mechanical advantage there is.
Basic run down: when someone pulls on the haul leg of rope, a unit of tension is input. That unit travels up the rope and around the sheave; which now that sheave sees two units of tension. The single unit of tension continues to travel through the rope, reaching the other sheave repeating the process; so now that sheave also sees two units of tension (4:1). When we flipped the pulleys around, there is a leg of rope locked off at the becket of the Twin Release, that single unit of tension continues to travel until it reaches that stop, effectively proving a 5:1 mechanical advantage. This would be considered a SIMPLE System.
Wow that's a really cool system I like that 👍
Sweet piece of kit, but they're sooo expensive. Even when you guys run the 20% off petzl sales. 😬