Welcome to Bigwalls.net, a repository of all things bigwall climbing.
HISTORY-->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').
Mechanical Advantage, Volume 1 (mostly European developments)
Mechanical Advantage. Volume 2 (mostly North American and international developments to the 1950s)
Buy the books here: https://www.bigwallgear.com/p/buy-the-books
Note: Bigwalls.com now goes to Ryan's big wall 'how not to' video and review pages--see note from his page below: