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' yumi bowstring '), is traditionally made of hemp, although most modern archers will use strings made of synthetic materials such as Kevlar, which will last longer. The nocking-point on the string is built up through the application of hemp and glue to protect the string and to provide a thickness which helps hold the nock (hazu (筈/弭, lit.
This page was last edited on 20 June 2020, at 21:08 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...
bowstring (equipment) – A fiber joining two ends of a bow for launching arrows. Can be rendered as two words ("bow string"). bowyer (craftsman) – One who makes bows; bracing (practice) – The act of attaching a bow string to a bow. brace height (measure) – The distance from the string to the pivot point of the bow's grip.
A bowstring joins the two ends of the bow stave and launches the arrow. Desirable properties include light weight, strength, resistance to abrasion , and resistance to water. Mass has most effect at the center of the string; one gram (0.035 oz) of extra mass in the middle of the string slows the arrow about as much as 3.5 grams (0.12 oz) at the ...
However, in a tied-arch or bowstring bridge, these movements are restrained not by the abutments but by the strengthened chord, which ties these tips together, taking the thrusts as tension, rather like the string of a bow that is being flattened. Therefore, the design is also called a bowstring-arch or bowstring-girder bridge. [1] [2]
The conventional arch supports a vertical load downwards on the centre of the arch and translates this into forces both downwards and outwards at the base of the arch. In most cases, this sideways force is a nuisance and must be resisted by either strong foundations or a further 'bowstring' girder, in the form of a tied-arch bridge.
The Whipple Cast and Wrought Iron Bowstring Truss Bridge over Norman's Kill in Albany, New York, is a very well preserved example of a Whipple Bowstring Arch Truss. Constructed by S. DeGraff of Syracuse, New York, 1867–69, it is still in daily use, with no posted weight limits. Due to the sleek appearance, many users think it is a modern bridge.
The ALCO RS-3 is a 1,600 hp (1.2 MW), B-B diesel-electric locomotive manufactured from May 1950 to August 1956 by American Locomotive Company (ALCO) and its subsidiary Montreal Locomotive Works (MLW).