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: Tools for the Wild Vertical, Volume 1 (mostly European tools and techniques to the 1930s)

 *Mechanical Advantage: Tools for the Wild Vertical, Volume 2 (mostly North American tools and techniques to the 1950s)

BUY THE BOOKS HERE:   https://www.bigwallgear.com/p/buy-the-books

Popular links:

• The D4 Delta2p--the new shape of portaledges (open source design)
• Open Source Portaledge Designs DIY Info, including BBF Activist's Ledge.
• The Original BigWalls.net--with various big wall info from the 80's and 90's
• Big Walls--what are they all about? (1990s John Middendorf slideshow)
• Ascent of the Grand Voyage on Great Trango Tower (as published)
• Big Wall Tech Manual (1988)--an early "how-to" big wall book
• Big wall climbing videos on John Middendorf's Youtube channel.