90 mm gun
| 90 mm M1A1 | |
|---|---|
A 90 mm M1 at CFB Borden
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| Type | Anti-Aircraft gun |
| Place of origin | United States |
| Service history | |
| In service | 1940–1950s |
| Used by |
United States, Canada, Republic of China, Brazil |
| Wars |
World War II, Korean War |
| Specifications | |
| Weight | Total: 8,618 kg (18,999 lb) Barrel: 1,109 kg (2,445 lb) |
| Length | 4.73 m (15 ft 6 in) |
| Barrel length | 4.60 m (15 ft) L/53 |
| Width | 4.16 m (13 ft 9 in) |
| Height | 3.07 m (10 ft) |
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| Shell | 90×600 mm R |
| Shell weight | 10.61 kg (23 lb 6 oz) |
| Caliber | 90 mm (3.5 in) |
| Carriage | mobile |
| Elevation | −5° to +80° |
| Traverse | 360 degrees |
| Rate of fire | 25 rounds per minute (maximum) |
| Muzzle velocity | 823 m/s (2,700 ft/s) |
| Maximum firing range | Maximum horizontal: 17,823 m (58,474 ft) Maximum ceiling: 10,380 m (34,060 ft) (limited by 30 second fuse) |
The 90 mm Gun M1/M2/M3 served as a primary heavy American anti-aircraft and anti-tank gun, playing a role similar to the renowned German 88 mm gun. It was 90 mm (3.5 in) in caliber, and had a 4.60 m (15 ft) barrel, 53 calibers in length. It was capable of firing a 90×600 mm R shell 17,823 m (58,474 ft) horizontally, or a maximum altitude of 10,380 m (34,060 ft).
The 90 mm Gun was the US's primary anti-aircraft gun from just prior to the opening of World War II into the 1950s, when most anti-aircraft artillery was replaced by guided missile systems. As a tank gun, it was the main weapon of the M36 tank destroyer and M26 Pershing tank, as well as a number of post-war tanks. It was briefly deployed 1943-46 as a coast defense weapon with the United States Army Coast Artillery Corps.
Prior to World War II, the primary US anti-aircraft gun was the 3-inch M1918 gun (76.2 mm L/40), a widely used caliber for this class of weapon. Similar weapons were in British, Soviet and other arsenals. There had been several upgrades to the weapon over its history, including the experimental T8 and T9 versions developed in the early 1930s that were intended to enter service later in the decade.
However the US Army became interested in a much more capable weapon instead, and on June 9, 1938 it issued a development contract calling for two new guns, one of 90 mm which it felt was the largest possible size that was still capable of being manually loaded at high elevations, and another, using assisted loading, of 120 mm caliber. The new design seemed so much better than developments of the older 3-inch that work on the 3-inch T9 was canceled in 1938 just as it became production-ready. By 1940 the second development of the 90 mm design, the T2, was standardized as the 90 mm M1, while its larger cousin became the 120 mm M1 gun.
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Wikipedia