New
Top
Community








Mechanical Advantage: Tools for the Wild Vertical
The history of engineered tools for climbing and alpinism.
(Looking for D4 portaledges? See bigwalls.net)
main
all the bigwallgear.com posts and references
free downloadable books and PDFs
Share this publication

Mechanical Advantage: Tools for the Wild Vertical
www.bigwallgear.com

Mechanical Advantage: Tools for the Wild Vertical
The history of engineered tools for climbing and alpinism. (Looking for D4 portaledges? See bigwalls.net)
By John Middendorf
· Over 1,000 subscribersBy registering you agree to Substack's Terms of Service, our Privacy Policy, and our Information Collection Notice
© 2023 John Middendorf
Substack is the home for great writing