Seamanship

Tick-tock, tick-tock: The slowly swaying, 100-pound stump (above, right) simulated the wear at the point where fiber exits a bare, poorly prepped stanchion hole (above, left). We also performed our standard “sawing” abrasion test on a grinding stone (right).

Slicing, Dicing Abrasion Data

For testing, we used the same abrasion rig we used to test sewn eyes and rope (see PS March 2015). A modified wood lathe sawed line samples back and forth (a 3/4–inch stroke) at seven cycles per second through a 10-millimeter test stanchion hole. We tested each sample to failure, effectively condensing months or years of wear into just minutes.

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