Tag: Rope Rescue

Lightweight Jigger Testing

Lightweight Jigger Testing Lightweight Jigger Complete

Introduction For backcountry rescue, the aim is to use lighter weight gear balanced with functionality and performance.  A couple of years ago, I made up a lighter weight jigger (4:1CD/5:1 pre-rigged pulley system) using a 6mm cord made with a Dyneema core with a polyester sheath. Although we did some initial testing with a 5mm […]

Figure-8 Device Block for Canyoning

Figure-8 Device Block for Canyoning

Figure-8 Device Blocks for Canyoning 2021 Catching up with another canyoner recently they showed me a failure method for a particular Releasable Figure-8 Device Block (Releasable-8 Block) used as a setup for abseiling in a canyon. Correct Rigging Correct Rigging Incorrect Rigging This block is called Releasable-8 Block V1 (for reference purposes) – above left and […]

Back-tie rigging – tension and compression forces

Back-tie rigging – tension and compression forces RRRFG pg 65 backtie rigging

Back-tie rigging – tension and compression forces The other day I had a question come through about how I worked out the tension and compression forces for a post, pole or tree when you back-tie for support.  The context? Before I get to the question, we need to set the context:  The front anchor is […]

Let’s lighten the load – update

Let’s lighten the load – update Two Rope Drop Testing 2

Let’s lighten the load – Update. After a particularly arduous 24hrs underground and 1000m of hauling on a deep cave SAREX (Search And Rescue EXercise), we started our journey towards asking the right questions about rope rescue. Could we lighten up our backcountry rope rescue gear while keeping acceptable safety margins? For lightweight rope rescue, […]

How much friction for your device?

How much friction for your device? Friction Testing

How much friction for your device? We were interested to know (as a guide) how much a lowering device can hold for rescue in particular but also personal use. The testing is for practical use when out on a rescue, training or instructing a group about how much it can hold in relation to: the […]

Life on the edge: testing the edge kit

Life on the edge: testing the edge kit Edge Kit 4on2 Drop Test Factor 1

Introduction We have used an edge kit for several years. Over this time, I have never done any testing on the combination of Purcell Prusik (Prusik on a Prusik), Prusik hitch 6mm on 8mm cord and double overhand (scaffold) hitch onto a carabiner. There has also been an assumption made that the edge kit would […]

Forces on an inclined plane and Tippy the tip truck

Forces on an inclined plane and Tippy the tip truck

Forces on an inclined plane and Tippy the tip truck How do you figure out the forces is a common question I get when teaching a particular subject. None more so than those on an inclined plane (or slope). Rather than getting onto the whiteboard to explain, from time to time, I bring out Tippy the […]

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