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post #1 of Old 11-17-2013 Thread Starter
pdqaltair
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Pull-testing stitiching and seizings

I was bored today, and I happen to have a pull-testing rig from my rock climbing gear design days. I decided to break some things.

The short version is that the sewn eyes were stronger than the line until I got up to Warpspeed, but even then I could have just added a little more stitching. The seized eyes? Not as impressive. It takes a good amount of seizing and the safety factor is far less for something that looks very strong. Seizing over stitching? Very easily stronger than the line and the seizing protects the stitching.

Sail Delmarva: Testing of Stitched and Seized Eyes

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I like splices when they make sense; just yesterday I was making a few spare soft shackles. I like knots when they make sense; just last week I shortened a halyard and topping lift to move wear spots. But once in a while a stitched eye seems to be the answer (older stiff line and no room for a knot).

(when asked how he reached the starting holds on a difficult rock climbing problem that clearly favored taller climbers - he was perhaps 5'5")

"Well, I just climb up to them."

by Joe Brown, English rock climber




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