kernmantle

by susan | Aug 15, 2022 | Uncategorized

here I go again, giddy over a word.

it began with research into carabiners, which led to research into climbing ropes, which led me to attempt to understand rope construction. my head began to spin as I tried to understand the three-strand hawser rope, because “with the lay” and “against the lay” are unfamiliar terms, and possibly also because the accompanying graphic was from the 1943 Seamen’s Pocketbook.

I decided I didn’t really need to understand that design, essentially because the climbing world moved on.

the latest iterations of climbing rope are light years beyond those used a century ago, which has led to an increased number of climbers surviving falls. most significant was the discovery of nylon, and its introduction into climbing rope, adding elasticity and strength. in 1953 the “kernmantle” design was born, brought to life by a german company, edelrid, and remains key to climbing ropes to this day; its mantle and core provide strength and stretchiness for dynamic—more elastic—and for static—less elastic—ropes.

I smile at the name for this design, yet its origin is not complex: the “kern” or core consists of nylon filaments which are spun into yarn, which is then twisted to form a ply, and then a few of these are twisted together, creating a bundle. several bundles form the kern. the mantle is simply a nylon sheath that is braided around the core or kern. ta-da.

I often think about the multitudes of people who have eased my path in this life. from safe climbing ropes to motors and engines to medical discoveries to electricity, to the convenience of grocery stores and internet shopping, to the gifts of companionship and camaraderie and support, I have benefitted tremendously, in ways I cannot even express, from the creativity of others who came before me.

if I can but pass along love and gratitude, is that enough?