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The 16"/50 Mark 7 - United States Naval Gun was originally intended to fire the relatively light 2,240 pound (1,016 kg) Mark 5 armor piercing shell, the shell handling system for these guns was redesigned to use the "super-heavy" 2,700 pound (1,225 kg) APC Mark 8 before any of the USS Iowa class battleships were laid down. This heavier projectile made these guns nearly the equal in terms of penetration power to the 460 mm (18.1 in) guns of the Japanese Yamato class battleships yet they weighed less than three-quarters as much.

The weapon is constructed of liner, A tube, jacket, three hoops, two locking rings, tube and liner locking ring, yoke ring and screw box liner. Some components were autofretted. As typical of United States naval weapons built in the 1940s, the bore was chromium plated for longer barrel life. Uses a Welin breech block that opens downwards and is hydraulically operated. The screw box liner and breech plug are segmented with stepped screw threads arranged in fifteen sectors of 24 degrees each.

Gun Characteristics

Designation	16 in (406 mm) 50 Mark 7
Ship Class Used On	Iowa (BB-61) and Montana (BB-67) Classes
Date Of Design	1939
Date In Service	1943
Gun Weight	267,904 lb (121,519 kg) (including breech) 239,156 lb (108,479 kg) (without breech)
Gun Length oa	816 in (20.726 m) (breech face to muzzle)
Bore Length	800 in (20.320 m)
Rifling Length	682.86 in (17.344 m)
Grooves	(96) 0.150 in deep (3.81 mm)
Lands	N/A
Twist	Uniform RH 1 in 25
Chamber Volume	27,000 in³ (442.5 dm³)
Rate Of Fire	2 rounds per minute
Note: The primer cartridge can be either electric or percussion fired.

Naval guns 400 mm artillery American weapons World War II weapons

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Topics: 16-50 Mark 7, 16th Century, 1624, 1626, 1642, 1661, 1608...

16th century15th century 16th century 17th century more centuries) As a means of recording the passage of time, the 16th century was that century which lasted from 1501 to 1600. Events Beginning of the " Little Ice Age" a cooling period that resulted in lower crop yi	1624Events The Netherlands establish a trading colony at Kaohsiung on Taiwan. Thirty Walloon families settle in the New Netherland colony. Oslo is destroyed by fire. When rebuilt by Christian IV, it would be renamed Christiania. Claudio Monteverdi publishes T	1626Events September 30 Nurhaci , chieftain of the Jurchens and founder of the Qing Dynasty dies and is succeeded by his son Hong Taiji. Spanish establish a trading colony on Taiwan. Peter Minuit, director of the New Netherland colony, begins a policy of "pur
1642Events January 4 Charles I attempts to arrest five leading members of the Long Parliament, but they escape. Beginning of English Civil War. March 1 Georgeana, Massachusetts (now known as York, Maine) becomes the first incorporated city in America May 17 S	1661Events January 6 The fifth monarchy men unsuccessfully attempt to seize control of London. George Monck's regiment defeats them February 5 The Shunzhi Emperor of the Qing Dynasty of China dies and is succeeded by his son the Kangxi Emperor. February 14 Ge	1608Events October 2 Dutch lensmaker Hans Lippershey demonstrates the first telescope in the Dutch parliament July 3 Quebec City founded by Samuel de Champlain. August 24 The first official English representative to India lands at Surat. Swedish troops enter
1648	1623	1662
1640s	1690	1688
1644	1603	1617

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