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The 18"/48 caliber Mark 1 – United States Naval Gun was the initial name and design for a large caliber naval gun in the early 1920s. After the Washington Naval Treaty prohibited the development of guns larger than 16 in (406 mm), the gun was relined and finished as a high velocity 16"/56 Mark 4 gun. After the start of World War II, the gun ...
31,400 yd (28,700 m) Maximum firing range. 40,500 yd (37,000 m) Filling weight. 243 lb (110 kg) The BL 18-inch Mk I naval gun was a breech-loading naval rifle used by the Royal Navy during World War I. It was the largest and heaviest gun ever used by the British. [1] Only the Second-World-War Japanese 46 cm/45 Type 94 had a larger calibre, 18.1 ...
British 18-inch torpedo. There have been a number of 18-inch (45cm) torpedoes in service with the Royal Navy of the United Kingdom. These have been used on ships of the Royal Navy and aircraft of both the Fleet Air Arm and Royal Air Force, while Royal Navy surface ships and submarines use 21-inch torpedoes. The British 18-inch torpedoes were 17 ...
The 46 cm (18.1 in) 46 cm/45 Type 94 naval rifle was a wire-wound gun. Mounted in three 3-gun turrets (nine per ship), they served as the main armament of the two Yamato -class battleships that were in service with the Imperial Japanese Navy during World War II. When the turrets and the guns were mounted, each weighed 2,510 tons, which is about ...
Metric (SI) units. 25.4 mm. A fire hydrant marked as 3-inch. The inch (symbol: in or ″) is a unit of length in the British Imperial and the United States customary systems of measurement. It is equal to 1 36 yard or 1 12 of a foot. Derived from the Roman uncia ("twelfth"), the word inch is also sometimes used to translate ...
1:480. 0.635 mm. Model railways (T) T scale, using 3 mm gauge track to represent standard gauge railways. 1:450. 0.677 mm. Model railways (T) T scale, using 3 mm gauge track to represent 3 ft 6 in (1,067 mm) gauge railways. Hasegawa also produces plastic ship models in this scale.
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American 18-inch torpedo. There have been a number of 18-inch torpedoes in service with the United States. These have been used on ships and submarines of the US Navy. American "18-inch" torpedoes were actually 17.7 inches (45 cm) in diameter, beginning with the "Fiume" Whitehead torpedo of 1890. Ship classes that carried 18-inch torpedoes include: