9/25/2023 0 Comments Spectra line west marine![]() Copper compounds are used as bacteriostatic agents, fungicides, and wood preservatives.Ĭopper is essential to all living organisms as a trace dietary mineral because it is a key constituent of the respiratory enzyme complex cytochrome c oxidase. Copper is sometimes used in decorative art, both in its elemental metal form and in compounds as pigments. Ĭommonly encountered compounds are copper(II) salts, which often impart blue or green colors to such minerals as azurite, malachite, and turquoise, and have been used widely and historically as pigments.Ĭopper used in buildings, usually for roofing, oxidizes to form a green patina of compounds called verdigris. Coper ( Old English) and copper were derived from this, the later spelling first used around 1530. In the Roman era, copper was mined principally on Cyprus, the origin of the name of the metal, from aes cyprium (metal of Cyprus), later corrupted to cuprum (Latin). 4000 BC and the first metal to be purposely alloyed with another metal, tin, to create bronze, c. 5000 BC the first metal to be cast into a shape in a mold, c. Thousands of years later, it was the first metal to be smelted from sulfide ores, c. This led to very early human use in several regions, from c. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins, and constantan used in strain gauges and thermocouples for temperature measurement.Ĭopper is one of the few metals that can occur in nature in a directly usable metallic form ( native metals). A freshly exposed surface of pure copper has a pinkish-orange color. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. Maybe someone who was there or the LRI who made the ruling can explain otherwise.Copper is a chemical element with the symbol Cu (from Latin: cuprum) and atomic number 29. I don’t see why this would have been ruled illegal. There is no rule outright allowing adhesive materials on the rope. Adhesive tape, though it is an adhesive non-fibrous material, is generally both flexible and non-metallic. Therefore there is no rule that the whipping material must be fibrous. Instead, it must be “flexible and non-metallic”. This is the way I read it: The whipping material in the last 4 inches is exempted from the requirement to be entirely “flexible, non-metallic fibers”. (~10 cm) of any cut end (E) which may be whipped ( with material that is flexible and non-metallic) or fused only to prevent fraying. ![]() a “binder coat”) flexible, non-metallic fibers sewn, twisted, tied, woven, knitted, crocheted, intertwined, or braided together except for the last 4 in. consist entirely of (except for dye or adhesive applied by the VENDOR as part of the normal manufacturing process for a COTS item and no longer tacky, e.g. After that we added the stopper knot to the spectra above the big knot. As noted in the video, the only failure of our rope was one match where the spectra rope pulled through the big figure 8 knot. Spectra is very slippery, and knots that work with other types of rope will pull out of spectra rope. If you are using some other type of loop knot at the bottom of your rope, be sure to use a version that’s suitable for spectra rope. You can figure out how much for yourselves, experimentally. Each of these knots consumes a surprising amount of rope length. We use three knots in our rope: the figure 8 knot in the spectra, that keeps the core from pulling through the big knot the big figure 8 knot, that rests on the davit fingers and a slip knot just above the velcro patches, that allows a couple wraps around the climber shaft before starting to climb. ![]() The length of the spectra rope will be specific to each team’s robot and climber. Watch the instructional video we put together last night. Solid braided rope from West Marine, 5/8" diameter. ![]() After seeing so many posts about ropes failing in competition, 2363 has decided to share our method for making ropes with the FRC community. During the quarter-finals of our last competition our Pilot looked out over the field and noted that 3 of the teams of the field were using our climbing ropes, one of which was on the opposing alliance.
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