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The lightweight 16-in/50 Mark 7 was designed to resolve this conflict. These guns were 50 calibers long, 50 times their 16-inch (406 mm) bore diameter with barrels 66.7 ft (20.3 m) long, from chamber to muzzle. Each gun weighed about 239,000 lb (108 t) without the breech, and 267,900 lb (121.5 t) with the breech. [1]
Mod 11 was a Mod 7 that had the chamber lengthened, adding 235 cu in (3,851 cm 3), and a 3½° breech band seating slope and used Breech Mechanism Mark 12. Mod 12 used a Mod 10 and lengthened the chamber and added a 3½° breech band seating slope with Mod 13 being similar but of a Mod 8, Mod 14 used a Mod 9, Mod 15 used a Mod 7, Mod 16 used a ...
The Mark 7 helmet is a former general issue combat helmet of the British Armed Forces, which was replaced by the Revision Batlskin Cobra Plus as part of the Virtus programme. Officially known as the GS (General Service) Mark 7 combat helmet , it replaced the previous Mk 6 and Mark 6A helmets.
The Mark 7 was a major step in the evolution of the modern torpedo. [1] This innovative design featured the use of steam , generated from water sprayed into the combustion pot along with the fuel . The resulting mixture dramatically boosted the efficiency of the torpedo, leading to markedly improved performance. [ 3 ]
The Mark 7 was fitted with retractable stabilizer fins so it could be carried under fighter-bomber aircraft. The Mark 7 warhead ( W7 ) also formed the basis of the 30.5 inches (775 mm) BOAR rocket , the Mark 90 Betty nuclear depth charge , MGR-1 Honest John rocket, MGM-5 Corporal ballistic missile , and Nike Ajax surface-to-air missile.
The Mk 7 Mod 6 bomb dispenser is the same as the Mk 7 Mod 3 except that the outside of the Mod 6 cargo section is coated with a thermal protective coating and has an additional yellow band around the forward end of the cargo section. The addition of the thermal coating increases the overall weight of the Mod 6 to 505 pounds (229 kg).
Modern U.S. Navy aircraft carriers have the Mark 7 Mod 3 arresting gear installed, which have the capability of recovering a 50,000-pound (23 t) aircraft at an engaging speed of 130 knots (240 km/h; 150 mph) in a distance of 344 feet (105 m) in two seconds.
BL 8 inch Howitzer Mk 6 - 8, a Vickers gun from World War I; the Mk VII was introduced in 1916; Mark VII tank, a British tank design from World War I; BL 14 inch / 45 mk VII naval gun, Royal Navy gun from the 1930s.303 round Mk VII (1910): standard British Empire rifle and machine-gun cartridge in World Wars I and II.