Differences between revisions 10 and 11

Kevlar

(Kevlar is a trademark of DuPont)

stephanie-kwolek.kevlar.jpg

Kevlar is a high strength aramid fiber invented by Stephanie Kwolek in the 1960s, and sold by DuPont since 1971

A 14 km/s loop increases speed by 69 m/s over a 100 km descent. That is a stretch of 0.49%, 20% of the strength/tensile ratio
A 12 km/s loop increases speed by 80 m/s over a 100 km descent. That is a stretch of 0.67%, 28% of the strength/tensile ratio

stretch V2r2r1(r2−r1) V2964kms2

Kevlar Technical Guide downloaded from DuPont. Properties pdf page 9, thermal page 120

-  ⇤ ← Revision 10 as of 2017-05-27 01:05:22 → 
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+   ← Revision 11 as of 2017-05-27 01:05:38 → ⇥
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-$ \large stretch ~ \approx ~ { \Large { { \mu ( r_2 - r_1 ) } \over { V^2 r_2 r_1 } } ~ \approx ~ 9.64 km/s^2 \over V^2 } $
+$ \large stretch ~ \approx ~ { \Large { { \mu ( r_2 - r_1 ) } \over { V^2 r_2 r_1 } } ~ \approx ~  { 9.64 km/s^2 \over V^2 } } $

Diff for "Kevlar"