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The Reverse Winch problem is sometimes taught as an option for vehicle recovery when the only way out is backwards. It is an interesting study in Ideal and Theoretical Mechanical Advantage and many struggle to determine whether
Following are the images from each of the questions in the quiz with worked solutions using the ‘T-method’ for calculating Ideal and Theoretical MA. You need to be logged in to view the rest of the content.
Many rope technicians are familiar with the option of using the long tail of a set-of-fours as an adjustable positioning lanyard. One very popular pre-configured system is the AZTEK kit which is built with components from Sterling
The Cats Paw knot is mainly used by anglers but is also occasionally used by riggers to shorten and attach a sling to a hook. The question raised here is whether this knot could be useful for rock
This image shows two possible hauling scenarios each using a Petzl IDs for progress capture. There are several ways to determine the mechanical advantage of this system but it is a good exercise to consider the following