Discussion in 'Randall's Adventure & Training®' started by Jeff Randall, Mar 11, 2018.
Looks super complicated. I dont even know what im looking at to be honest.
That ledge is intense.
The gin pole, or monopod, gives you high help when there otherwise is none. It reduces the friction over the edge, makes hauls easier, and facilitates getting a patient over the edge, in or out of a basket. You can also rappel off it, and rigging and edge transition are easier as a result. You see a couple of hauls in the pics--a 7:1 haul and a "twin tension" haul with 7:1 on one side and 3:1 on the other.
Stone Door is a beautiful place. As I have said before, the Tri-State region has some of the coolest locations in the country.
A way to get off the edge like a crane type of thing?
Similar but it's just a fixed gin pole. Like Guyon said, main use is to reduce friction and give you a higher anchor to work from. With that said, when you set one up there are physics involved that you have to be aware of. Resultant angles are the most important. Goal is to compress the pole. Here's a side view pic I took so I could look at my resultant and angles after we got home. This is almost perfect setup from a physics standpoint. Ideal is the resultant to be doing full compression on the pole down its centerline. We like to err on the front side of the pole slightly (as shown in this pic) since as you come up with patient load the resultant changes.
Sort of. But it doesn't move like a crane. Follow that neon green rope in most of the pics and imagine it laying on the rocky bluff instead. Going across the edge, either way, is a lot tougher when the rope is not elevated.
Pay no attention to the negative kN shown on the resultant. That's actually a positive, not a negative.
I wish I could do the rappelling stuff always looks amazing
Is imagine youd have to be pretty sure that pole doesnt slip back right?
It's all in the physics. Setup right it is bombproof. Screw up your physics and it's gonna fail. Again, it's all about the resultant force of the angle compressing the pole in a linear fashion. Get that resultant off too much and you will be over-stressing your guy lines, pole and all the other factors that come into play. You'll learn about vector angles at SRT as well as safety factors. Whether you're just setting a recreational rappel anchor or doing a 2-person load rescue haul, you live and possibly die by vector angles and safety factors.
it is a nice place. just about 20 miles form my house, wish i had got to watch. Richard Thomas filmed his Hank JR movie there.
Mike Mallner is taking some friends of his next weekend for some rappelling, so there won't be any rescue stuff going on (hopefully!), so you should go out and watch.
I started to post it up on here that we were going to be doing some rescue exercises there this past weekend but forgot to do it.
The green rope, 13th pic from the top.
Are you pulling someone up with that?
Semo, in that pic we are about to lower Patrick over the edge on the green rope. It's a scarab - a lowering device / descender.
Thanks. Can’t imagine rigging that in the dark in a rescue situation. Perfect practice makes perfect.
Preferred by the National Park Service rescue teams. You can read more here:
In that pic, the device is locked off in a soft lock. Great device for lowering because of all the options to easily control friction and ease of lock-off. Also a great device for rappelling when your feet can touch the bluff. On a long free rappel, however, it'll spin you till you're sick.
Being a former machinist, I noticed the 59 (118 included) degree angles is the same angle used to sharpen general purpose drills. There must be something to that angle.