Richard Delaney Archive
Auto locking belay devices: when will the rope slip? There are many auto-locking devices used by technicians as: Personal descenders Anchored devices for lowering loads Anchored devices to hold tension while raising loads Just how much can
The Skate Block is an excellent low-force technique for lowering and raising. The analysis of the Skate Block is a great example of the application of physics and this enables us to determine where the load should
Friction through Progress Capture Devices (PCDs). This image shows three different devices rigged and loaded as if positioned at the back of a hauling system. We can use the Capstan equation to predict the loss through each
There is a common claim that “Dropped aluminium carabiners should be discarded as they can suffer invisible damage or ‘micro-fractures’ that may cause them to break below their rated strength.” The history of this claim is unknown
Many manufacturers state that the maximum life of their webbing products is ten years. Many people seem to keep using webbing products older than 10 years so we decided to conduct some tests. You need to be logged