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The second 16-inch (406 mm) gun was the United States Army 50 caliber Model 1919 (M1919). The first of these was deployed to Fort Michie , Great Gull Island , New York on a unique all-around-fire M1917 disappearing carriage, with elevation increased from 15° to 30°. [ 4 ]
The original M1919 was designed for use with tanks. [14] The water-cooled M1917 was inappropriate due to weight and the vulnerability of the water jacket. Browning modified the M1917 to be air-cooled by making changes that included dropping the water jacket and using a heavier barrel. [14] In total, there were six variants of the basic M1919 ...
Construction of the 16-inch Mark 2 and Mark 3 guns was also cancelled with 70 completed, plus the prototype, Gun No. 42. Twenty of the existing guns were transferred to the Army in 1922 to supplement the Army's more massive and much more expensive 16-inch gun M1919, of which only seven were ever deployed. The remaining Mk2/Mk3 guns were ...
The effective length of the barrel (from breech to muzzle) is divided by the barrel diameter to give a dimensionless quantity. [2]: 81 For example, the main guns of the Iowa-class battleships can be referred to as 16"/50 caliber. They are 16 inches in diameter and the barrel is 800 inches long (16 × 50 = 800).
Complementing the 16-in/50 caliber Mark 7 gun was a fire control computer, the Ford Instrument Company Mark 8 Range Keeper. This analog computer was used to direct the fire from the battleship's big guns, taking into account factors including the speed of the targeted ship, the projectile's travel time, and air resistance.
The last new disappearing gun installation was a solo 16-inch gun M1919 at Fort Michie on Great Gull Island, New York, completed in 1923. In the U.S., due to lack of funding for sufficient replacements, the disappearing gun remained the most numerous type of coast defense weapon until replaced by improved weapons in World War II .
This originated the 16-inch M1920 howitzer, 25 calibers long. The high-angle M1920 barbette carriage was designed to allow plunging fire with an elevation of 65 degrees. A similar carriage was also developed for the 16-inch gun M1919, 50 calibers long, with the same elevation and for the same reason. [6]
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