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Tuesday, October 29, 2013
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Label: bmw, cuaca panas
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Thursday, March 13, 2008
Synthetic Rope for Winch
Synthetic rope for winch
in extreme climates and terrains from mud, snow, sand, and rocks,and resistan in hight temperature. It can placed at cars or truck or adventure vehicle with winch
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Synthetic Rope for Military Applications
Military Use Synthetic RopeMilitary use Synthetic rope in Ships and Mothervessel to help tied ship whenever stand in harbour and for Portable Bridge Reinforcement Cables. Even NAVAL FACILITIES ENGINEERING COMMAND WASHINGTON DC CHESAPEAKE DIV recommended this kind of rope for ocean engineering and construction applicatitions.This guide is based on available technical data which is representative of state-of-the-art knowledge of the material, rope design, manufacturing processes, test procedures and application engineering. The various constructions available are compared with similiar constructions of other rope materials including wire rope and comments are made on the relative merits of each for different ocean engineering applications. This comparative data between aramid fiber rope and rope made from other materials is an aid to help support objective decisions by an engineer in selecting rope materials. Since cost factors are important considerations in the selection process, the relative cost of comparable ropes of various materials are established. In addition, this guide provides information on splices and terminations for aramid rope so that the engineer will understand joint efficiencies, reliability factors and load constraints involved in selecting and specifying splices and terminations. It discusses service considerations such as sheave sizing, abrasion, fake-down requirements, sharkbite protection, environmental exposure and related application information which is needed to specify handling and protecitve requirements.
Label: synthetic rope for military applications
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Synthetic Rope Properties and End Connector Concepts
IntroCurrently, wire rope is used universally in timber harvesting for skylines, guylines, winchlines, support
lines, truck wrappers, chokers, and running lines. It has advanced cable logging and it is employed around
the world in millions of miles annually. However, wire rope is heavy, corrodes, and is difficult and timeconsuming
to splice. Additionally, used wire ropes develop jaggers that puncture the hands of
woodsworkers.
One of the major difficulties with synthetic rope is adapting it to current end connections for use with
harvesting systems. Because of the low coefficient of friction, standard wire rope clamps, fist grips, etc.
that would yield 90%+ breaking strength with steel wire rope, only yield 50-60% breaking strength with
synthetic rope.
Synthetic rope has a much lower critical temperature compared to
steel rope and is intolerant of heated connections. Finally, the low coefficient of friction makes pressed
connections difficult. Essentially, the rope’s physical, chemical, and mechanical properties that make it an
excellent substitute for wire rope in timber harvesting also make it difficult to couple with existing cable
systems.www.cbs.state.or.us
Label: ropes, synthetic rope, timber
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Description
There is four section for describe ropes made from high strength synthetic materials
This for section are :
High strength synthetic rope compared to wire
Materials available for rope construction
Constructional changes that alter rope performance
Summary and Reference Material
1.High strength synthetic rope compared to wire
Weight Comparison,Payload Comparison in Water,Free Length
2.Material
Kevlar,Other Aramid Fiber,Spectra
3.Construction
This chapter discusses only two constructions of synthetic rope that perform
well with oceanographic winch systems. Kevlar ropes are made in most wire rope
constructions for wide variety of applications. Some additional uses of Kevlar and
Spectra ropes include:
Oceanographic Mooring
Balloon Tethers
Mine Sweep Cables
Riser Tensioners
Moorings on Oil Rigs
Winch Lines for Utility Trucks
Helicopter Slings
Oil Containment Booms
Lift Lines of Cranes
4.SUMMARY
Since there are so many uses for synthetic rope, it is impossible to have one
material or construction to suit each application, making a variety of ropes
necessary.
Label: introduction, material
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