no need for shouting or derision.
i apologize...
i was WRONG to post that a knot is stronger than the webbing, cord, rope used to tie it.
when i climbed, 10 years ago, i never had an equipment failure, though i didn't fall much. i was always the leader, and took several courses in advanced climbing and rescue techniques. it's been awhile, so i apologize for my faulty memory. i was still a pretty decent climber! ever do mama buttons in joshua tree? i got on that one expecting 5.8, but a hold had broken off and it was more like 5.10b. i made it, but i was confused at the difficulty of the moves...
i followed the link to the strength of materials site, i bookmarked it for further study. looks like there's a wealth of information there.
as far as webbing compared to dynamic rope, true enough, dynamic rope has a lot different characteristics than webbing.
i believe the 22kN figure has already been scientifically determined via the proper tests, so even with only 40% strength left after knot tying, the webbing should handle 8.8kN in a worst-case scenario (for this particular webbing), or about a ton...
the 1" nylon webbing can handle a falling nissan!
that's why we hang climbers from it.
i just feel that most rockets weigh a lot less than a human, so demand slightly less concern when overbuilding is concerned. iow, if it'll hold a falling human, it'll hold a falling rocket even without the strongest knot in the world.
that said, i followed a link from the hpr materials strength site to a kevlar attachment method that looks like it could be easily adapted to nylon tubular webbing ...
it appears to be roughly 2x stronger that a knot for kevlar, anyway.