Welcome to Bigwalls.net, a repository of all things bigwall climbing.
Mechanical Advantage: Tools for the Wild Vertical Volume 1 and 2:
Between 2021-2023, I have been posting research articles on the historical tools and techniques of climbing on bigwallgear.com.
Below are links to PDF's of the compiled research (large files-tip: right click and select 'download file').
BUY THE BOOKS HERE: https://www.bigwallgear.com/p/buy-the-books
SEARCH bigwalls.net AND BigWallGear.com:
Note: Bigwalls.com now goes to Ryan's big wall 'how not to' video and review pages--see note from his page below:
Above: Portaledge evolution 2017-2020 (left: D4 full-size 2017, right: D4 Delta2p 2020). Pete Zabrok photo.