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The Harvard Mark II, also known as the Aiken Relay Calculator, [1] [2] [3] was an electromechanical computer built under the direction of Howard Aiken at Harvard University, completed in 1947. It was financed by the United States Navy and used for ballistic calculations at Naval Proving Ground Dahlgren .
Mark II or Mark 2 often refers to the second version of a product, frequently military hardware. "Mark", meaning "model" or "variant", can be abbreviated "Mk."
.455 Webley is a British handgun cartridge, most commonly used in the Webley top break revolvers Marks I through VI. It is also known as ".455 Eley" and ".455 Colt".The .455 cartridge was a service revolver cartridge, featuring a rimmed cartridge firing a .455 in (11.5 mm) bullet at the relatively low velocity of 650 ft/s (190 m/s).
The MK II ("Mark Two") was made from 1982 to 2005. It replaced the Standard , Ruger's first model, made from 1949 to 1982, and the MK I Target , made from 1951 to 1982. MK II variations include the Target models, which have heavier barrels and adjustable sights, and the 22/45 models, which have a polymer frame with a grip-angle that matches the ...
The Double Eagle Mark II is larger but lighter than the first Double Eagle. [1] Measuring 2.1 metres (6 ft 11 in) long, 1.3 metres (4 ft 3 in) wide, and 0.5 metres (1 ft 8 in) high, the unit weighs 340 kilograms (750 lb), dives to 500 metres (1,600 ft), and can reach 6 knots (11 km/h; 6.9 mph). [ 1 ]
The Mark II model was released in July 1964 [1] with identical styling to the British Wolseley 16/60. [2] Updates to the 24/80 Mark I specification were: Power was increased from 80 bhp (60 kW; 81 PS) at 4,350 rpm to 85 bhp (63 kW; 86 PS) at 4,400 rpm. [3] A vacuum operated PBR power brake servo was fitted. [3]
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The Lynx Mark I prototype was expected to perform its first test flight in 2015, [11] [41] followed by a flight of the Mark II production model twelve to eighteen months afterward. [ 11 ] XCOR had planned to have the Lynx's initial flights at the Mojave Air and Spaceport in Mojave, California [ 42 ] or any licensed spaceport with a 2,400-metre ...