| BGM-71 TOW | |
|---|---|
A TOW missile being fired from an M151 MUTT. |
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| Type | Anti-tank missile |
| Place of origin | United States |
| Service history | |
| In service | 1970–present |
| Used by | See users |
| Production history | |
| Designer | Hughes Aircraft Company |
| Designed | 1963–1968 |
| Specifications | |
| Length | 1.16–1.17 m (probe folded) 1.41–1.51 m (probe extended) |
| Diameter | 0.152 m |
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| Warhead weight | 3.9–5.9 kg |
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| Wingspan | 0.46 m |
| Operational range |
up to 3,750 m |
| Guidance system |
Optically-tracked, wire-guided |
The BGM-71 TOW is an anti-tank missile. "BGM" is a weapon classification that stands for "Multiple Environment (B), Surface-Attack (G), Missile (M)". "TOW" is an acronym that stands for "Tube-launched, Optically-tracked, Wire command data link, guided missile".[1] The TOW was first produced in 1970 and is one of the two most widely used anti-tank guided missiles in the world.[2]
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Initially developed by Hughes Aircraft between 1963 and 1968, the XBGM-71A was designed for both ground and heli-borne applications. The BGM-71 TOW wire-guided heavy anti-tank missile is produced by Raytheon Systems Company. The weapon is used in anti-armor, anti-bunker, anti-fortification and anti-amphibious landing roles. TOW is in service with over 45 armed forces and is integrated on over 15,000 ground, vehicle and helicopter platforms worldwide.
In its basic infantry form, the system comprises a missile in a sealed tube which is clipped to a launch tube prior to use. When required, the missile tube is attached to the rear of the launch tube, the target sighted and the missile fired. The launch motor (booster) fires through lateral nozzles amidships and propels the missile from the tube, at which point four wings indexed at 45 degrees just forward of the booster nozzles spring open forwards, four tail control surfaces flip open rearwards, and sustained propulsion is subsequently provided by the flight motor. An optical sensor on the sight continuously monitors the position of a light source on the missile relative to the line-of-sight, and then corrects the trajectory of the missile by generating electrical signals that are passed down two wires to command the control surface actuators.[3]
The TOW missile was continually upgraded, with an improved TOW missile (ITOW) appearing in 1978 which had a new warhead triggered by a long probe that was extended after launch to give a stand-off distance of 15 in (380 mm) for improved armor penetration. The 1983 TOW 2 featured a larger 5.9 kg (13 lb) warhead with a 21.25 in (540 mm) extensible probe, improved guidance and a motor that provided around 30% more thrust.[4] This was followed by the TOW 2A/B which appeared in 1987.
Hughes developed a TOW missile with a wireless data link in 1989, referred to as TOW-2N, but this weapon was not adopted for use by the US military. Raytheon continued to develop improvements to the TOW line, but its FOTT (Follow-On To TOW) program was canceled in 1998, and its TOW-FF (TOW-Fire and Forget) program was cut short on 30 November 2001 because of funding limitations.[5] In 2001 and 2002, Raytheon and the US Army worked together on an extended range TOW 2B variant, initially referred to as TOW-2B (ER), but now called TOW-2B Aero which has a special nose cap that increases range to 4500 meters. Although this missile has been in production since 2004, no US Army designation has yet been assigned. Also, a wireless version of the TOW-2B Aero was developed that uses stealth one way radio link, called TOW-2B Aero RF.[6]
The TOW missile in its current variations is not a fire-and-forget weapon, and like most second generation wire-guided missiles has Semi-Automatic Command Line of Sight guidance. This means that the guidance system is directly linked to the platform, and requires that the target be kept in the shooter's line of sight until the missile impacts. This has been the major impetus to develop either a fire-and-forget version of the system or to develop a successor with this ability.
The TOW is designated as a BGM by the US military. By its very definition, a BGM is a Multiple Launch Environment (B) Surface Attack (G) Guided Missile (M). The B launch environment prefix is used only when the system can be used essentially unmodified when launched from a variety of launch platforms.
The M151 and M220 launchers are used by infantry, but can also be mounted on a number of vehicles, including the M151 jeep, the M113 APC, the M966 HMMWV and the M1045 HMMWV (which replaced the M966). These launchers are theoretically man-portable, but are quite bulky. The updated M151 launcher was upgraded to include thermal optics to allow night time usage, and had been simplified to reduce weight. The M220 was specifically developed to handle the TOW-2 series.
TOW systems have also been developed for vehicle specific applications on the M2/M3 Bradley IFV/CFV, the M1134 Stryker ATGM carrier, and the now obsolete M901 ITV (Improved TOW Vehicle); they are generally referred to as TOW Under Armor (TUA).
In helicopter applications, the M65 system used by the AH-1 series is the primary system deployed, but the XM26 system was developed for the UH-1, and a system was put into development for the later canceled AH-56 helicopter.
The M41 TOW improved target acquisition system (ITAS) is a block upgrade to the M220 ground/high-mobility multipurpose wheeled vehicle (HMMWV)-mounted TOW 2 missile system. The TOW ITAS is currently being fielded to airborne, air assault, and light infantry forces throughout the active and reserve components of the U.S. Army and U.S. Marine Corps where it is called the SABER. The ITAS, in addition to providing better anti-armor capabilities to antitank units, also has capabilities that make it an integral part of the combined arms team. Even when organized in heavy—light task forces, where the preponderance of antiarmor capabilities traditionally has resided in the heavy elements, TOW ITAS-equipped antitank units can not only destroy threat targets but also provide superior reconnaissance, surveillance, and target acquisition (RSTA), rear area protection, and urban operations capabilities.
The TOW ITAS consists of three new line replaceable units: the target acquisition subsystem (TAS), the fire control subsystem (FCS), and the lithium battery box (LBB); a modified TOW 2 traversing unit; the existing TOW launch tube and tripod; and a TOW Humvee modification kit. The TAS integrates into a single housing the direct view optics, a second-generation forward looking infrared (FLIR) night vision sight (NVS), missile trackers, and a laser range finder. TAS electronics provide automatic boresighting for these components, eliminating both tactical collimation and 180-day verification requirements.
In 1968 a contract for full scale production was awarded to Hughes, and by 1970 the system was being fielded by the US Army. When adopted, the BGM-71 series replaced the M40 106mm recoilless rifle and the MGM-32 ENTAC missile system then in service. The missile also replaced the AGM-22B then in service as a heli-borne anti-tank weapon.
On 24 April 1972, the US 1st Combat Aerial TOW Team arrived in South Vietnam; the team's mission was to test the new anti-armor missile under combat conditions.[7] The team consisted of three crews, technical representatives from Bell Helicopter and Hughes Aircraft, members of the United States Army Aviation and Missile Command, and two UH-1B helicopters; each mounting the XM26 TOW weapons system, which had been taken from storage. After displacing to the Central Highlands for aerial gunnery, the unit commenced daily searches for enemy armor.[7] On the 2nd of May 1972 the TOW made history as being the first time an American-designed and made guided missile was used successfully in combat by a US soldier, when US Army UH-1 Huey helicopters firing TOWs destroyed North Vietnamese tanks near An Loc.[8] On 9 May, elements of the NVA (North Vietnamese Army) 203rd Armored Regiment were attacking an ARVN (Army of the Republic of Vietnam) Ranger camp at Ben Het; the team destroyed its first three PT-76 tanks, breaking up the attack.[9] During the battle for the city of Kontum, the TOW missile had proven to be a significant weapon in disrupting enemy tank attacks within the region. By the end of May, TOW missiles had accumulated 24 confirmed tank kills.[10][11]
The TOW was used effectively during multiple engagements during Operation Desert Storm. Several TOW missiles were used by U.S. forces in Iraq in the July 22, 2003 assault that killed Uday Hussein and Qusay Hussein.[12]
Raytheon has taken over for Hughes in recent years, and now handles production of all current variants, as well as TOW development.
| Designation | Description | Length | Diameter | Wingspan | Launch weight | Warhead | Armor penetration (est.) | Range | Speed[13] |
|---|---|---|---|---|---|---|---|---|---|
| XBGM-71A/BGM-71A | Hughes Tube launched Optically tracked Wire command link guided (TOW) Missile | 1.16 m | 0.152 m | 0.46 m | 18.9 kg | 3.9 kg (2.63 kg HE) HEAT | 430 mm (exact value) | 65–3,750 m | 278 m/s |
| BGM-71B | BGM-71A variant; improved range | ||||||||
| BGM-71C | BGM-71B variant; Improved TOW (ITOW) w/ improved shaped-charge warhead | 1.41 m (probe extended) 1.17 m (probe folded) |
19.1 kg | 630 mm (exact value) | |||||
| BGM-71D | BGM-71C variant; TOW-2, improved guidance, motor and enlarged main warhead | 1.51 m (probe extended) 1.17 m (probe folded) |
21.5 kg | 5.9 kg (3.6 kg HE) HEAT |
900 mm | ||||
| BGM-71E | BGM-71D variant; TOW-2A optimized to defeat reactive armor with tandem warheads | 22.6 kg | 900 mm ( behind ERA ) (and layer of ERA) |
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| BGM-71F | BGM-71D variant; TOW-2B top-down attack variant using explosively formed penetrators | 1.168 m | no data | ||||||
| BGM-71G | BGM-71F variant; different AP warhead; not produced | no data | no data | no data | no data | ||||
| BGM-71H | BGM-71E variant; “bunker buster” variant for use against fortified structures | no data | no data | no data | no data |
Original armor penetration estimates were 600 mm for BGM-71A/B and 700–800 mm for BGM-71C. However, according to a now declassified CIA study "U.S. INTELLIGENCE AND SOVIET ARMOR" written by Paul F. Gorman (Major General, USA), the true penetration values against vertical target much lower—just 430 mm for basic TOW and 630 mm for Improved TOW (see graph US ATGMs vs. Soviet Tank on page 18 of mentioned document, available through Freedom of Information Act).
Time to target at maximum range is 20 seconds therefore giving an average speed of 187.5 m/s.[14]
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