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An unusually small crossbow bolt with a tapered "waist" shaft section and rear skirt compared to a 1 euro cent coin A bolt or quarrel is a dart -like projectile used by crossbows . [ 1 ] The word quarrel is from the Old French quarrel (> French carreau ) "square thing", [ 2 ] specialized use as quarrel d'arcbaleste (> carreau d'arbalète ...
21st-century hunting compound crossbow. A crossbow is a ranged weapon using an elastic launching device consisting of a bow-like assembly called a prod, mounted horizontally on a main frame called a tiller, which is hand-held in a similar fashion to the stock of a long gun. Crossbows shoot arrow-like projectiles called bolts or quarrels.
arbalest – A late variation of the crossbow that came into use in Europe during the 12th century; archer (practitioner) – One who practices archery (a.k.a. bowman) archer's paradox (effect) – The effect produced by an arrow flexing as it leaves the bow; archery (practice) – The practice of using a bow to shoot arrows
Crossbows were mass-produced in state armouries with designs improving as time went on, such as the use of a mulberry wood stock and brass; a crossbow in 1068 AD could pierce a tree at 140 paces. [25] Crossbows were used in numbers as large as 50,000 starting from the Qin dynasty and upwards of several hundred thousand during the Han. [26]
Diagram 3 shows three rope parts supporting the load W, which means the tension in the rope is W/3. Thus, the mechanical advantage is three-to-one. By adding a pulley to the fixed block of a gun tackle the direction of the pulling force is reversed though the mechanical advantage remains the same, Diagram 3a. This is an example of the Luff tackle.
The arbalest (also arblast), a variation of the crossbow, came into use in Europe around the 12th century. [1] The arbalest was a large weapon with a steel prod, or bow assembly. Since the arbalest was much larger than earlier crossbows, and because of the greater tensile strength of steel, it had a greater force.
Eli Terry was using interchangeable parts using a milling machine as early as 1800. Ward Francillon, a horologist, concluded in a study that Terry had already accomplished interchangeable parts as early as 1800. The study examined several of Terry's clocks produced between 1800–1807. The parts were labelled and interchanged as needed.
The classic fibula of the late-Roman era, and in fact the best known of all fibula types, is the crossbow type. [4] [5] The crossbow fibula consists of a highly arched semi-circular bow, usually of squarish cross-section, and a long flat foot. The fibula has a wide transverse bar (or arms) at the head containing the pin-hinge.