Bazooka
From Wikipedia, the free encyclopedia
| Launcher, Rocket, Antitank, M-9 Series | |
|---|---|
 Bazooka with Super Bazooka |
|
| Type | Recoilless rocket antitank weapon |
| Place of origin |  United States |
| Service history | |
| In service | 1942–Present |
| Used by | United States, Paraguay, many others |
| Wars | World War II; Korea |
| Production history | |
| Designer | U.S. Army Signal Corps |
| Specifications | |
| Length | 1.37 m (54 in.) |
The bazooka is a man-portable anti-armor rocket launcher, made famous during World War II, where it was one of the primary infantry anti-tank weapons used by the United States Armed Forces. It was one of the first weapons based on the High explosive anti-tank (HEAT) shell to enter service. It was nicknamed "bazooka" from a vague resemblance to the musical instrument of the same name invented and used by Bob Burns. It saw widespread use throughout WWII.
The German armed forces copied the design, increasing the caliber to 88 mm, as well as other changes, and issued it as the Raketenpanzerbüchse "Panzerschreck".
The word "bazooka" is often informally and incorrectly used to refer to any shoulder-launched missile weapon.
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[edit] Development
The development of the bazooka involved the development of two specific lines of technology: the rocket-powered (recoilless) weapon, and the shaped-charge warhead.
The development of the Rocket Powered Recoilless Weapon was the brainchild of Dr. Robert H. Goddard as a side project of his work on rocket propulsion. Goddard, during his tenure at Worcester Polytechnic Institute, Clark University, and at Mount Wilson Observatory, devised a tube rocket for military use during World War I. He successfully demonstrated his tube-fired rocket to the US Army Signal Corps at Aberdeen Proving Ground, Maryland, on November 6, 1918, but the end of the war only five days later killed interest in the weapon. Goddard continued to be a part-time consultant to the US Government at Indian Head, Maryland, until 1923, but he then ceased all work on the project, and others picked up where he left off.
The explosive shaped charge dates back to the work of American physicist Charles Edward Munroe, who did the first practical work on the subject in 1880. This work was built on in the 1930s by Henry Mohaupt, a Swiss immigrant who worked on the idea for the War Department (the predecessor of the Department of Defense).
Mohaupt developed a shaped-charge hand grenade for anti-tank use that was effective at defeating up to 60 mm (2.4 in) of armor, by far the best such weapon in the world at the time. The M10 grenade weighed 3.5 lb (1.6 kg) and was difficult to throw and too heavy to function as a rifle grenade. The only practical way to use it was to place it directly on the tank. A smaller version of the M10, the M9, was developed, which could be fired from a rifle. This resulted in the creation of the M1 (Springfield M-1903), M2 (Enfield M-1917) and the M7 and M8 for the M1 Rifle, and the M9A1 Grenade which was still Standard A.
Things changed when U.S. Army Lieutenant Edward G. Uhl, under the command of Colonel Leslie A. Skinner, suggested placing the grenade on the front of the experimental rocket launcher he had developed. Development took place in Corcoran Hall at The George Washington University in Washington, D.C. By late 1942, the Rocket Launcher, M1A1 was introduced. This consisted of a 54-inch-long (1.37 m) tube with a simple wooden stock and wooden sights (replaced by metal in the production models), into which the 60.07 mm (designated 2.36-inch to avoid confusion with rounds for the 60 mm mortar) rocket grenades were inserted at the rear. A two-cell dry battery in the buttstock provided a charge to ignite the rocket when the trigger was pulled. The main drawback to the weapon was the large backblast and smoke trail which gave away the position of the shooter (compared to the British PIAT). The original models were not reinforced for bore-safety, and they added a ring basket at the breech and a deflector at the muzzle of developmental models to control the backblast.
The original model was equipped with a hinged rear sight and fixed front sights. These were followed by a peep rear sight and a front sight in the form of a rectangular frame at the muzzle of the launcher. The vertical sides of the frame carried graduations for ranges of 100, 200 and 300 yards. In the production models, these sights were replaced by an optical ring sight hinged to fold against the tube when not in use, and protected by a cover. It had an adjustable range scale that provided graduations from 50 to 700 yards (46 to 640 meters) in 50 yard increments. The final major changes were the division of the tube into two pieces with bayonet joints for airborne deployment. This changed the weapon specifications to a tube length of 55 inches (1.4 meter) and a weight of 14 lb (6.35 kg), the replacement of the battery with a magneto operated through the trigger, and a trigger safety that isolated the magneto to prevent a misfire when the trigger was released and the storage of a charge that would prematurely fire the next round.
The ammunition for the original M9 Launcher was the M6 Series, which finalized as the M6A3 that was 19.4 inches (49.28 cm) long, and weighed 3.38 lb (1.53 kg).
Secretly introduced in Operation Torch, it was highly effective, though inherently inaccurate at all but very close ranges. Its impact was such that General Dwight D. Eisenhower later described it as (together with the atom bomb, jeep and the C-47 Skytrain transport aircraft) one of the four weapons which won World War II for the allies [1][2][3]. The Germans immediately copied it from captured weapons, to produce their own much larger version known as the Panzerschreck. It was the success of the Panzerschreck that caused the original bazooka to be reworked after the war to the larger 3.5-inch (88.9 mm) model that was identical in size and power to the German weapon.
The weapon's use in the Pacific theater, however, was not as effective. Japanese pill boxes, made from coconut and sand, proved too shock-absorbing to activate the explosive charge.
[edit] Variants
[edit] Rocket Launcher, M1 and M1A1 "Bazooka"
- First issued June 14, 1942 by Capt. L.A. Skinner.
- A1 addressed reliability issues with an improved electrical system.
[edit] Rocket Launcher, M9 "Bazooka"
- Improved model
- Supplanted M1A1 in 1945.
[edit] Rocket Launcher, M9A1 "Bazooka"
- Could be disassembled into two halves for easier carrying.
- Battery ignition replaced by trigger magneto.
[edit] Rocket Launcher, M20 "Super Bazooka"
- Larger 3.5 in (89 mm) diameter warhead.
- Could penetrate up to 200 mm of armor.
- Extended range by about 150 m.
- Entered service at start of Korean War
[edit] Rocket Launcher, M20B1 "Super Bazooka"
- Lightweight version with barrels made of cast aluminum, and other components simplified
- Used as a supplement to the M20
[edit] Rocket Launcher, M20A1/A1B1 "Super Bazooka"
- Product improved variant with improved connector latch assembly, entering production in 1952[1]
- Improved versions of the M20 and M20B1 respectively
[edit] Specifications
[edit] M1A1
- Length: 50 in (137 cm)
- Caliber: 60 mm (2.36 in)
- Weight: 15 lb (6.8 kg)
- Warhead: M6A1 shaped charge (3.5 lb, 1.59 kg)
- Range
- Maximum: 400 yards (365 m)
- Effective: 150 yards (135 m)
- Crew: 2, operator and loader
[edit] M9A1
- Length: 61 in (1,550 mm)
- Caliber: 60 mm (2.36 in)
- Weight: 15.95 lb
- Warhead: M6A3/C shaped charge (3.5 lb)
- Range
- Maximum: 400–500 yards (350–450 m)
- Effective: 120 yards (110 m)
- Crew: 2, operator and loader(M9) or 1, operator+loader(M9A1)
[edit] M19A1/A1B1
- Length (when assembled for firing): 60 in (1,524 mm)
- Caliber: 89 mm (3.5 in)
- Weight (Unloaded): M20A1: 14 lb (6.4 kg); M20A1B1: 13 lb (5.9 kg)
- Warhead: M28A2 HEAT (9 lb) or T127E3/M30 WP (8.96 lb)
- Range
- Maximum: 999 yds (823 m)
- Effective (Stationary Target/Moving Target): 300 yd (275 m) /200 yd (185 m)
- Crew: 2, operator and loader)
[edit] References
- ^ http://www.billricca.com/pubs/contactor_latch_assembly_standardized.jpg Preventative Maintenance Monthly, Nov 1952
[edit] See also
[edit] External links
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