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A 240 centimetres (94 in) Sling A climbing anchor equalized using dyneema slings. 1957 article on use of slings by Jan and Herb Conn.. A sling is an item of climbing equipment consisting of a tied or sewn loop of webbing.
This technique is mostly used for Dyneema ropes. [8] The principle of a Dyneema eye is a core-to-core splice, in which a length of at least 60 times the diameter of the rope is taken back into itself. DSM advises using 60 times the diameter for coated Dyneema, and 100 times the diameter for uncoated Dyneema. For 6mm coated rope, this would mean ...
Dyneema Composite Fabric (DCF), also known as Cuben Fiber (CTF3), is a high-performance non-woven composite material used in high-strength, low-weight applications. It is constructed from a thin sheet of ultra-high-molecular-weight polyethylene ( UHMWPE , "Dyneema") laminated between two sheets of polyester .
The butterfly loop, also known as lineman's loop, butterfly knot, alpine butterfly knot and lineman's rider, is a knot used to form a fixed loop in the middle of a rope.Tied in the bight, it can be made in a rope without access to either of the ends; this is a distinct advantage when working with long climbing ropes.
A typical 11 mm (0.43 in) UHMWPE rope of 30 m (98 ft) can weigh around 2 kg (4.4 lb), the equivalent steel wire rope would weigh around 13 kg (29 lb). One notable drawback of UHMWPE rope is its susceptibility to UV damage, so many users will fit winch covers in order to protect the cable when not in use.
The mechanism has a rocker arm [5] [6] on each side of the bike that replaces the round sprockets (which are usually only on the right side) on chain driven bikes. In contrast to traditional derailleur chain drives, the drive does not slip when changing gears, [7] and the gearing can be changed even when the bicycle is almost stationary.