Pulleys & Mechanical Advantage

WHAT YOU NEED TO KNOW ABOUT THE PETZL SPIN PULLEYS

WHAT YOU NEED TO KNOW ABOUT THE PETZL SPIN PULLEYS For rescue teams all over the world, having the most efficient equipment possible for whatever situation they may face, is an absolute priority. Released in 2020, the Petzl MAESTRO descender with integrated progress-capture pulley delivers exactly that. In addition, the family of SPIN pulleys rounds …

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MORE IS POSSIBLE ~ Introducing the 13 mm CMC CLUTCH™ BY HARKEN INDUSTRIAL™

CMC CLUTCH by Harken Industrial is the latest evolution in rescue and rope access hardware. The CLUTCH is patented and made in the USA by CMC and Harken Industrial in a partnership that combines over 90 years of experience in rescue and rope management. Suited to a multitude of rigging operations, the CLUTCH moves seamlessly …

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Recommended Rope Systems ~ Two Tension Rope System (TTRS) Raise and Lower

Recommended Rope Systems ~ Two Tension Rope System (TTRS) Raise and Lower Two-Tensioned Rope System – Raise A Two-Tensioned Rope System shares the load between two ropes, both under tension. Each system is capable of functioning as both mainline or back-up to the other line. System System Benefits Maestro • load is distributed between two …

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Ascenders and Clamps Technical Tips: How to calculate mechanical advantage

©Petzl Technical Information ©Petzl How to calculate mechanical advantage A mechanical advantage haul system reduces the effort required to raise a load. The mechanical advantage obtained is based on the pulley effect. 1. The pulley effect If we consider a load suspended on a rope, the rope passing through a pulley above the user, with …

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How To Calculate Mechanical Advantage with Petzl Gear

A mechanical advantage haul system reduces the effort required to raise a load. The mechanical advantage obtained is based on the pulley effect.   1. The Pulley Effect If we consider a load suspended on a rope, the rope passing through a pulley above the user, with the user’s hand holding the rope on the …

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Two Rope Twin Tension Mini Offset… Backcountry Meets Fire Service

~This is a quick snippet of something we filmed when we first opened up RLA’s studio lab ~ Two Rope Twin Tension Mini Offset… Backcountry Meets Fire Service   So backcountry meets fire service… sounds like a battle of some sort.  So while this “match up” is really neither epic nor epoch, this contest does …

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Staggered Anchors: Progression from 3:1 to 9:1 Simple Mechanical Advantage

  Excerpt from Knots & Pulleys in Rope Rigging Systems Vol. 1 Segment 7 In continuing with the discussion about pulley systems this video reviews the 5 rules of simple pulley systems before delving into the principles of a 3:1 MA, mechanical advantage, and compounding a 3:1 system to a 9:1 using staggered anchors for …

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The Gear Used In Artificial Highlines and Two Tension Rope Systems

Ultimate – the best achievable or imaginable of its kind. Can we have The Ultimate Gear List for anything?  Probably not, but we can put some thought into what that might look like. Before we get to the list, let us outline where this gear cache came from. In building this course with Jason Ilowite …

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PETZL MAESTRO features

The MAESTRO combines the abilities of a progress-capture pulley and a descender for effective hauling, releasing and lowering of the load. The AUTO-LOCK system locks the load automatically and returns the handle to the stop position.   Let’s start with a Petzl Maestro Overview! 1. Working principle The MAESTRO uses a pulley mounted on a …

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Pulley system efficiency tests with Petzl Maestro, I’d S, Pro Traxion and RollClip

There can be a big difference between the theoretical efficiency of a pulley system and its actual efficiency. Here are test results from the Petzl lab. 1. Efficiency depending on the device used at the head of the system. The force required to raise a 100 kg mass was tested under several configurations with different …

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