Members: Hauling Friction
![](https://www.ropelab.com.au/wp-content/uploads/2014/10/Petzl-PCD-XraySquareThumb-150x100.jpg)
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