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A bungee cord (sometimes spelled bungie; also known as a shock cord or an ocky strap) is an elastic cord composed of one or more elastic strands forming a core, usually covered in a woven cotton or polypropylene sheath. The sheath does not materially extend elastically, but it is braided with its strands spiraling around the core so that a ...
Soloflex, Inc. was established in 1978 by Jerry Wilson. The idea behind the weight straps came from Jerry's days flying small airplanes. The resistance on the plane's controls came from the bungee cord. Jerry used this idea to create the Weightstraps that provide enough resistance to equal large amounts of free weight.
Kushma Bungee Jump is the world's second-highest bungee jump with a height of 228 metres (748 ft). [23] It is located in the gorge of Kaligandaki River and world-first natural canyon bungee jump. Another commercial bungee jump currently in operation is just 13 metres (43 ft) smaller, at 220 metres (720 ft).
Shoe closures can resist a large force with only a small amount of hook-and-loop fasteners. This is because the strap is wrapped through a slot, halving the force on the bond by acting as a pulley system (thus gaining a mechanical advantage), and further absorbing some of the force in friction around the tight bend. This layout also ensures ...
That the bungee creates a rough surface, increasing drag; however, in reality it is extremely unlikely that any increase in drag would be significant. That drag is a minor concern, but entanglement is a real hazard; for this reason, many technical wreck and cave divers use "bungee-less" wings, as the elastic cords increase the risk of snagging.
EPDM rubber (ethylene propylene diene monomer rubber) [1] [2] [3] is a type of synthetic rubber that is used in many applications. EPDM is an M-Class rubber under ASTM standard D-1418; the M class comprises elastomers with a saturated polyethylene chain (the M deriving from the more correct term polymethylene).