M113 Armored Personnel Carrier
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| M113A3 | |
|---|---|
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| Type | Armored personnel carrier |
| Place of origin |  United States |
| Service history | |
| In service | 1960 - |
| Used by | Numerous nations, see text |
| Wars | Vietnam War, others |
| Production history | |
| Number built | ~80,000 (all variants) |
| Variants | Numerous, see text |
| Specifications | |
| Weight | 12.3 tonnes |
| Length | 4.863 m |
| Width | 2.686 m |
| Height | 2.5 m |
| Crew | 2 + 11 passengers |
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| Armor | aluminium 12-38 mm |
| Primary armament |
M2 Browning machine gun |
| Secondary armament |
varies (see text) |
| Engine | Detroit Diesel 6V53T, 6-cylinder diesel engine 275 hp (205 kW) |
| Power/weight | 22.36 hp/tonne |
| Suspension | torsion bar, 5 road wheels |
| Operational range |
~480 km (~300 miles) |
| Speed | 66 km/h (41 mph) |
The M113 is an armored personnel carrier family of vehicles in use with the US military and many other nations.
It is a fully tracked vehicle capable of limited amphibious operation in lakes and streams, extended cross-country travel over rough terrain, and high speed operation on improved roads. The M113 family has many variants and modifications that are used in a variety of combat and combat support roles. Approximately 80,000 units of all types have been produced worldwide making it the most widely used armored fighting vehicle of all time. [1] Although not a tank, or even designed as a fighting vehicle, the M113 was the most utilized armored vehicle of the Vietnam War[citation needed]. It inspired newer generations of more heavily armored and armed infantry fighting vehicles. Yet it remains in front-line service and production in the 21st century, and the M113 was recently declared the best in a television comparison of "top 10" armored personnel carriers and infantry fighting vehicles.[2]
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[edit] History
[edit] Origins
The M113 was first introduced in 1960 and in 1962 was fielded in Vietnam, but without the added ACAV sets, which consisted of gun shields and belly armor. The M113 was developed from the M59 and M75 Armored Personnel Carrier which were designed by Food Machinery Corp. and Kaiser Aluminium and Chemical Co. in the late 1950s. The M113 was originally developed and manufactured by FMC of San Jose, California to fulfill the requirement to be an "Airborne Armored Multi-Purpose Vehicle Family" (AAM-PVF) [3] of all-purpose, all-terrain armored fighting vehicles as outlined by General James M. Gavin who was the Army's Chief of Research & Development at the time.
Two vehicles were initially considered, the T113 and T117. The T113, effectively the prototype of the M113, was chosen because it was marginally lighter than the T117. This was a product of the T113 being made of aluminum rather than steel. This difference on construction material was the major difference between the two vehicles. The T113 design was improved upon as the T113E1, and adopted by the US Army in 1960 as the M113. A diesel prototype T113E2 was put into production in 1964 as the M113A1. The M113A1 quickly supplanted the gasoline engined M113 in service.[4]
[edit] Vietnam
The Vietnam War was the first combat opportunity for "Mechanized" Infantry, a technically new type of infantry with its roots in the Armored Infantry of World War II, now using the M113 Armored Personnel Carrier. In addition, Armored Cavalry Squadrons in Vietnam consisted largely of M113s after replacing the intended M114 in a variety of roles, and Armor battalions contained M113s within their headquarters companies, such as the maintenance section, medical section, vehicle recovery section, mortar section, and the scout (reconnaissance) section.
M113s were instrumental for escorting convoys through contested territory in Vietnam, and are commonly seen in combat photos, sometimes with M48 or M551 tanks for added firepower. Some M113s with improved/modified main gun shields similar to or directly modified from existing ACAV equipment have been deployed to Iraq for similar duties.
The USAF used M113 and M113A1 ACAV vehicles in USAF Security Police Squadrons providing air base ground defense support in Vietnam.
[edit] Design and development
The M113 first entered service with the U.S. Army in 1960. It was developed to provide a highly mobile, survivable, and reliable tracked-vehicle platform that is able to keep pace with the current armored vehicles and tanks of the day. It requires only two crewmen, a driver and a commander, and carries eleven passengers inside the vehicle. Its main armament is a single .50 cal (12.7 mm) M2 Browning machine gun operated by the commander.
The M113 was designed to transport troops, protected against small arms fire and shell fragments, to the front line where they would disembark. During early engagements in the Vietnam War, when Army of the Republic of Vietnam (ARVN) troops were pinned down by fire, they found that they could not simply return fire from within and overwhelm opposing forces. The exposed .50 caliber machinegunner's position made the gunner vulnerable to enemy small arms fire, even if the opposing force lacked the firepower to stop their lightly armored M113s. They soon fitted makeshift shields for the vulnerable machine gun.
The predecessor to the standardized Armored Cavalry Assault Vehicle (or ACAV) variant was introduced by the Army of the Republic of Vietnam during the early 1960s. During the M113's initial fielding in Vietnam in 1962, it was found that the commander and cargo hatch positions were extremely exposed and the vehicle's armament was in many ways lacking. The ARVNs had modified the M113s to function as "amphibious light tanks"[5] and not as battle taxis as US designers had intended. Instead of an armored personnel carrier, the ARVN utilized the carried infantry as extra "dismountable soldiers" in an "an over-sized tank crew."[6] These "ACAV" sets were eventually adapted to US Army M113s, with the arrival of the US Army's conventional forces in 1965. The vehicles continued to operate in the role of a light tank and reconnaissance vehicle, and did not operate as designed in theatre. Still, the M113 could carry 11 infantrymen inside, with two crewmen operating the M113.
The US Army, after berating the Vietnamese for flouting battle doctrine, came out with their own ACAV version. This more or less standardized ACAV kit included shields and a circular turret for the .50 caliber M2 machine gun in the Track Commander (TC) position, and 2 additional M60 machine guns with shields for the left and right rear positions, and "belly armor", which consisted of a sheet of steel, bolted from the front bottom extending 1/2 to 2/3 way towards the bottom rear of the M113. The two rear machine gunners could fire their weapons while standing inside the open cargo hatch, which was rectangular in shape. This transformed the M113 into a fighting vehicle, but the vehicle in such a role still suffered from its lightly armored configuration, having never been designed for such a role. A number of prototypes with factory-installed firing ports on each side of the APC were constructed, and at least one of these XM734 was deployed to Vietnam for testing. Reports from the field were reportedly not enthusiastic.
Modified versions of the Vietnam War ACAV sets have been deployed to Iraq (Formally referred to as Southwest Asia within the US military) for installation on the current M113 series vehicles in use. An improved circular shield turret deployed to Iraq, and such vehicles have been utilized without the 2 rear stations. However, they reportedly are modified with armor to protect the Track Commander (TC) position and are NOT employing the two rear left and right machine gun stations.
The M113 is built of aircraft quality aluminum which gives it some of the same strength as steel at a slightly reduced weight (the vehicle weighs approximately 10.5 tons), as the greater thickness allows structural stiffness. Its weight allows the use of a relatively small engine to power the vehicle, a Detroit 2-stroke six cylinder diesel, as well as allowing the vehicle to carry a large payload cross-country and to be transported by fixed and rotary-wing aircraft. It can also swim without deploying any flotation curtains, powered by tracks, which was of tactical importance in battlefields like Vietnam which required crossing a multitude of terrain features; such as jungles, swamps, muddy dirt roads, forests, and rice fields.
The current M113A3 has a 480 km range and a maximum speed of 64 km/h. The upgraded M113A3 has added spall suppression liners, armored external fuel tanks, a more powerful engine and transmission, and mounting plates for the option of bolt-on titanium, aluminum, ceramic, or high-hardness steel appliqué armor. Band tracks and hybrid-electric drive features can make the M113 stealthy and travel faster than 60 mph on roads while doubling range from 300 to 600 miles on one load of fuel, but these features have not be added to operational vehicles.[verification needed]
Today’s M113 fleet includes a mix of these A2 variants together with other derivatives equipped with the most recent A3 RISE (Reliability Improvements for Selected Equipment) package. The standard RISE package includes an upgraded propulsion system (turbocharged engine and new transmission), greatly improved driver controls (new power brakes and conventional steering controls), external fuel tanks, and 200 AMP alternator with 4 batteries. Additional A3 improvements include incorporation of spall liners and provisions for mounting external armor.
The future M113A3 fleet will include a number of vehicles that will have high speed digital networks and data transfer systems. The M113A3 digitization program includes applying appliqué hardware, software, and installation kits and hosting them in the M113 FOV.
[edit] Nicknames
The M113 has never received an official name, but has received a variety of nicknames over the years. The NLF called it the "Green Dragon"; the Swiss referred to it as the "Elefantenrollschuh" or elephants' roller-skate; the Germans called it the "Schweinewürfel" or pig cube.[7][8] U.S. troops tended to refer to the M113 simply as a "track". Some sources have referred to the M113 as the "Gavin" in an allusion to Gen. Gavin, but U.S. forces have never used the name.[7] The Israeli official name for the M113 is "Bardelas" (Cheetah) but the troops call it "Zelda" (another nickname is "Zippo" after the brand of lighters, as the M113 tends to combust when hit by anti-tank weapons). The Australian Army refers to its M113A1s as "Buckets", and the modified M113A1 fitted with 76mm turrets as "Beasts".
[edit] Modifications for Iraq
The M113 has relatively light armor, but is being augmented with reactive armor, add-on plates, and RPG standoff cages ("slat armor"). Windowed gunshields developed by an armorer in Iraq are reminiscent of ACAV vehicle modifications so effective in Southeast Asia (Vietnam War). Band tracks to replace the high maintenance, road damaging steel tracks are in use by Canadian and other forces.
Most of the M113s which are still in service have been upgraded. However, they are still lightly protected compared to modern APCs or IFVs such as the M2 Bradley or IDF Achzarit. Those larger vehicles cannot be transported in a C-130 plane so it may be argued that their capability to be air-deployed provides an advantage over more heavily armored vehicles. A fervent pro-M113 community has developed due to the versatility of the platform.
The M113 has also been adopted to replace the aging fleet of visually modified (vismod) M551s being used to simulate Russian-made combat vehicles at the US Army's National Training Center in Fort Irwin, California. These M113s, like the M551s they replace, have also been modified to resemble enemy tanks and APCs, such as the T-80 and BMP-2. One of the advantages of the M113 being used to simulate the latter is that the infantry squad can now ride inside the simulated BMP instead of in a truck accompanying a tank masquerading as one, as was often the case with the M551s.
[edit] Weapons
The basic M113 armored personnel carrier can itself be fitted with a number of weapon systems. Most common is a single .50 caliber M2 machine gun or 40mm Mk 19 automatic grenade launcher. A number of anti-tank weapons were also fitted. Armored Cavalry units in Vietnam removed jeep mounted M40 106mm recoilless rifles fitting them to their M113s instead. The US Army also developed a kit that allowed the Dragon anti-tank missile system to be mounted to the existing machine gun mount, without having to remove the machine gun. This allowed the commander to use the weapon, as well as the machine gun.
[edit] Basic variants
- M113A1
- 1964 diesel replaces gasoline engine
- M113A2
- 1979, cooling and suspension improvements
- M113A3
- 1987, further improvements for "enhanced (battlefield) survival"
Yoke for steering instead of laterals. More powerful engine. External fuel tanks.
- M113 Armored Cavalry Assault Vehicle (ACAV)
The "Armored Cavalry Assault Vehicle" or "ACAV", was introduced in the Vietnam war after it was found that the commander and cargo hatch positions were extremely exposed and the vehicle's armament was in many ways lacking. Initially field expedient shields and mounts were used, then a kit was produced on Okinawa for the .50 cal. machine gun. Finally, the full ACAV kit, manufactured in the U.S., was introduced. The kit included shields and circular turret armor for the commander's Browning M-2 .50 caliber machine gun, and two additional 7.62mm M60 machine guns, again with shields, fitted on either side of the top cargo hatch. This kit could be retrofitted to any M113. ACAV kits were also sometimes fitted to the M106 mortar carrier, but the different rear hatch found on this vehicle required the left M60 machine gun to be fitted to the extreme rear instead of the side. Many kits were added in the field, but at least in the case of the 11th Armored Cavalry Regiment, the vehicles were modified in the U.S. before the unit left Ft. Meade, Maryland for Vietnam. Additional armor in the form of a mine protective kit under the hull was also frequently fitted.
- Other
A huge number of M113 Armored Personnel Carrier variants have been created, ranging from infantry carriers to nuclear missile carriers. The M113 Armored Personnel Carrier has become one of the most prolific armored vehicles of the second half of the 20th century, and continues to serve with armies around the world into the 21st century. Not without its faults, the otherwise versatile chassis of the M113 has been used to create almost every type of vehicle imaginable. Few vehicles ever created can claim the application to such a wide range of roles.
[edit] Operators
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[edit] See also
- FV432 - a contemporary British vehicle
- Pbv 302 - Swedish APC
- Boxer MRAV - Germany's replacement for the M113
- AIFV - FMC's "Product Improved M113A1"
[edit] References
- ^ BAE Systems
- ^ Top 10 Military Channel program
- ^ Simon Dunstan, The M113 Series, page 5, Osprey Publishing, London, 1983
- ^ Tunbridge, 1978. p. 4
- ^ Zumbro, 1998. p. 470
- ^ Zumbro, 1998. p. 470
- ^ a b M113 Armored Personnel Carrier. GlobalSecurity.org. Retrieved on 2007-02-26.
- ^ Nicknames of army vehicles in your country. MilitaryPhotos. Retrieved on 2007-02-26.
- ^ DEFENCE BALANCE IN WESTERN BALKANS Research Institute for European and American Studies
- ^ kmweg.de: Neue DINGO-Variante für die Bundeswehr (German) - Published 17 November 2005, Checked 23 May 2007
- ^ bundeswehr.de: Neue Waffensysteme (German) - Checked 23 May 2007
- ^ Index of military equipment Lebanese Army of Lebanon Index des équipements militaires armée libanaise du Liban
- ^ List of armaments of the Polish Army as of June 2005
- ^ Army Equipment - Taiwan
- Dunstan, Simon. The M113 Series London, UK: Osprey Publishing, 1983. ISBN 0-85045-495-6.
- Nolan, Keith W. Into Laos: Dewey Canyon II/Lam Son 719. Novato, CA: Presidio Press, 1986. ISBN 0-89141-247-6.
- Tunbridge, Stephen. M113 in Action. Carrollton, TX: Squadron/Signal Publications, Inc, 1978. ISBN 0-89747-050-8.
- Zumbro, Ralph. The Iron Cavalry. 1998, New York, New York, Pocket Books. ISBN 0-671-01390-4
[edit] External links
- Army Fact File for M113
- United Defence
- FAS.org
- Gary's Combat Vehicle Reference Guide
- NASA Kennedy Space Center site
- Tenix - LAND 106 M113 Upgrade Project
- M113 performance vs. RPG-7
- M113 at Israeli Weapons
- Canadian Forces Official Website
- M113 ACAV Operations with 11th ACR in Vietnam
- Dutch Cavalry Museum has an M113 C&V (M113 ACAV) in its exposition.
- Australian DoD M113 Upgrade Project
