Q: What makes a one pulley more efficient than another? There are a couple of key factors that affect the efficiency of a rescue pulley. The diameter of the sheave (the wheel in a pulley system that supports the rope) can make a difference – the smaller the diameter, the more bending of the fibers […]
Efficiency Unveiled: Understanding the Mechanics of Rescue Pulleys Read More »
Mainline rescue and rigging systems encompass a comprehensive set of principles and techniques crucial for safely and effectively performing various forms of rescue and rigging operations. These systems are essential in scenarios like technical rescue, wilderness rescue, and industrial rigging, where precision and safety are paramount. Below is a synoptic overview of the key aspects
Mastering the Art of Mainline Rescue and Rigging: A Comprehensive Guide Read More »
Rigging plays a pivotal role in the world of rescue operations, where the ability to analyze and manage forces effectively can make the difference between a successful mission and a potential disaster. In this blog, we will delve into three fundamental aspects of rigging: understanding the forces at play, harnessing mechanical advantage with pulley systems,
Mastering Rigging Fundamentals: Forces, Mechanical Advantage, and Moving Systems Read More »
We’re back here at the lab, and this is a continuation of what we’ve done, the past couple of days with high lines. In quick review, We had, and we built the track line, and we had the control line for our basic high line system. Now what we’ve added to it is a third
English Reeve: Control Side & Carriage System Highline Systems Read More »
The Harkin Wingman is a compact haul kit that offers versatility, functioning as either a four-to-one or a five-to-one kit depending on how you position the load. You’ll notice significant distinctions when comparing the Wingman to other mini haul kits available on the market, with one notable feature being its exceptional compactness. We’ve engineered this
The New Harken Industrial Wingman Read More »
Get More Done With Less… and remove the mystery out of “the theory” of Mechanical Advantage Systems. Mechanical Advantage Systems ~ arguably is the “bulwark” of rope rescue… giving strong support, encouragement and leadership to those in need. Wait! Doesn’t “bulwark” have to do with wall like structures raised for defense? Like a seawall? Sort
9 Ways To Quickly Get A Hold of the 3 Types of Mechanical Advantage Systems Read More »
This is a repost from CMCPro.com 5/17/22 Where To Get CMC Pulleys Raising systems are essential in any rescue or rigging scenario in which loads are lifted using rope. A raising system using a combination of pulleys to leverage the force applied in lifting is referred to as a mechanical advantage (M/A) system. Whether building
PULLEYS AND MECHANICAL ADVANTAGE SYSTEMS Read More »
System Efficiency Effect of pulley friction. Most rescue pulleys have an efficiency rating of .75 to .90 (only 75% to 90% of tension is transferred from one side of the pulley to another due to friction). A carabiner used as a pulley has an efficiency of only about 50% or less (more for a steel
System Efficiency of Mechanical Advantage Systems Read More »
Kudos goes out to Peak Rescue Institute for the help. The purpose of this lesson is to give the student rescuer a more thorough understanding of mechanical advantage. It will review basic concepts learned in the technician course and add advanced concepts such as the T-method, system efficiency, haul system progressions, and counter-balance haul systems.
Progressing to the Next Level in Understanding Mechanical Advantage Using The T-Method Read More »
Thank you to Peak Rescue Institute for the graphics In this section, students will learn five different MA systems: 1:1, 2:1, 3:1, 4:1, and 5:1. This range of MA systems is sufficient to address the majority of rescue hauls encountered in normal field operations. As with most other aspects of rope rescue, consistent practice building
Mechanical Advantage Progression Read More »
