AIM-4 Falcon
Encyclopedia
The Hughes
Hughes Aircraft
Hughes Aircraft Company was a major American aerospace and defense contractor founded in 1932 by Howard Hughes in Culver City, California as a division of Hughes Tool Company...

 AIM-4 Falcon
was the first operational guided air-to-air missile
Air-to-air missile
An air-to-air missile is a missile fired from an aircraft for the purpose of destroying another aircraft. AAMs are typically powered by one or more rocket motors, usually solid fuelled but sometimes liquid fuelled...

 of the United States Air Force
United States Air Force
The United States Air Force is the aerial warfare service branch of the United States Armed Forces and one of the American uniformed services. Initially part of the United States Army, the USAF was formed as a separate branch of the military on September 18, 1947 under the National Security Act of...

.

Development

Development of a guided air-to-air missile began in 1946
1946 in aviation
This is a list of aviation-related events from 1946:- Events :* The American Section of the International League of Aviators resurrects the National Trophy, a Harmon Trophy awarded from 1926 to 1938 to the outstanding aviator of the year in each of the 21 member countries of the now-defunct League...

. Hughes Aircraft
Hughes Aircraft
Hughes Aircraft Company was a major American aerospace and defense contractor founded in 1932 by Howard Hughes in Culver City, California as a division of Hughes Tool Company...

 was awarded a contract for a subsonic missile under the project designation MX-798, which soon gave way to the supersonic
Supersonic
Supersonic speed is a rate of travel of an object that exceeds the speed of sound . For objects traveling in dry air of a temperature of 20 °C this speed is approximately 343 m/s, 1,125 ft/s, 768 mph or 1,235 km/h. Speeds greater than five times the speed of sound are often...

 MX-904 in 1947
1947 in aviation
This is a list of aviation-related events from 1947:-January:* January 11 – The BOAC Douglas C-47A G-AGJX crashes into a hill at Stowting in southeast England, killing eight of the 16 people on board and injuring all eight survivors...

. The original purpose of the weapon was as a self-defense weapon for bomber aircraft, but after 1950
1950 in aviation
This is a list of aviation-related events from 1950:- Events :* Arrow Air is founded.* The Brazilian Navy begins to reestablish an air arm of its own when an aeronautics directorate is created within the Ministry of the Navy.-January:...

 it was decided that it should arm fighter aircraft
Fighter aircraft
A fighter aircraft is a military aircraft designed primarily for air-to-air combat with other aircraft, as opposed to a bomber, which is designed primarily to attack ground targets...

 instead, particularly in the interception role
Interceptor aircraft
An interceptor aircraft is a type of fighter aircraft designed specifically to prevent missions of enemy aircraft, particularly bombers and reconnaissance aircraft. Interceptors generally rely on high speed and powerful armament in order to complete their mission as quickly as possible and set up...

.

The first test firings took place in 1949
1949 in aviation
This is a list of aviation-related events from 1949:- Events :* Aerolíneas Argentinas is established.* Royal Jordanian Air Force is formed as the Arab League Air Force.* Republic of Korea Air Force is formed.* Lebanese Air Force is formed....

, at which time it was designated AAM-A-2 and given the popular name Falcon. A brief policy of awarding fighter and bomber designations to missiles led it to be redesignated F-98 in 1951
1951 in aviation
This is a list of aviation-related events from 1951:-Events:* Three aerial refueling points are installed on a modified United States Air Force B-29 Superfortress, making it the worlds first triple-point aerial tanker...

. In 1955
1955 in aviation
This is a list of aviation-related events from 1955:- Events :* The United Kingdoms first atomic bomber unit, the Royal Air Forces No. 138 Squadron, becomes operational, flying Vickers Valiants.-January:...

 the policy changed again, and the missile was again redesignated GAR-1.

The initial GAR-1 and GAR-2 models entered service in 1956
1956 in aviation
This is a list of aviation-related events from 1956:-February:* February 18 – An engine fire breaks out on a Scottish Airlines Avro York just after takeoff from Malta International Airport, Luqa, Malta...

. It armed the F-89 Scorpion
F-89 Scorpion
The Northrop F-89 Scorpion was an early American jet-powered fighter designed from the outset as an all-weather interceptor. Though its straight wings limited its performance, it was among the first USAF jet fighters with guided missiles, and notably the first combat aircraft armed with air-to-air...

, F-101B Voodoo
F-101 Voodoo
The McDonnell F-101 Voodoo was a supersonic military jet fighter which served the United States Air Force and the Royal Canadian Air Force...

 and F-102 Delta Dagger
F-102 Delta Dagger
The Convair F-102 Delta Dagger was a US interceptor aircraft built as part of the backbone of the United States Air Force's air defenses in the late 1950s. Entering service in 1956, its main purpose was to intercept invading Soviet bomber fleets...

 interceptor
Interceptor aircraft
An interceptor aircraft is a type of fighter aircraft designed specifically to prevent missions of enemy aircraft, particularly bombers and reconnaissance aircraft. Interceptors generally rely on high speed and powerful armament in order to complete their mission as quickly as possible and set up...

s. The only other users were Canada, Finland, Sweden and Switzerland, whose CF-101 Voodoo
CF-101 Voodoo
The CF-101 Voodoo was an all-weather interceptor aircraft operated by the Royal Canadian Air Force and Canadian Forces between 1961 and 1984. They were manufactured by the McDonnell Aircraft Corporation of St. Louis, Missouri for the United States Air Force , and later sold to Canada...

, Saab 35 Draken and Mirage IIIS
Dassault Mirage III
The Mirage III is a supersonic fighter aircraft designed by Dassault Aviation during the late 1950s, and manufactured both in France and a number of other countries. It was a successful fighter aircraft, being sold to many air forces around the world and remaining in production for over a decade...

 carried the AIM-4 Falcon. Canada also hoped to use them on the CF-105 Arrow
CF-105 Arrow
The Avro Canada CF-105 Arrow was a delta-winged interceptor aircraft, designed and built by Avro Aircraft Limited in Malton, Ontario, Canada, as the culmination of a design study that began in 1953...

 interceptor
Interceptor aircraft
An interceptor aircraft is a type of fighter aircraft designed specifically to prevent missions of enemy aircraft, particularly bombers and reconnaissance aircraft. Interceptors generally rely on high speed and powerful armament in order to complete their mission as quickly as possible and set up...

, that was never realized because of the Arrow's cancellation.

Fighters carrying the Falcon were often designed with internal weapons bays for carrying this missile. The Scorpion carried them on wingtip pods, while the Delta Dagger and Delta Dart had belly bays with a trapeze mechanism to move them into the airstream for launch (see picture above). The F-101B had an unusual bay arrangement where two were stored externally, and then the bay door would rotate to expose two more missiles. It is likely the F-111 internal bay would have accommodated the missile as well, but by the time of service, the Air Force had already dropped the Falcon for use against fighters, as well as the idea of using the F-111 as an air combat fighter.

The GAR-1 had semi-active radar homing
Semi-active radar homing
Semi-active radar homing, or SARH, is a common type of missile guidance system, perhaps the most common type for longer-range air-to-air and surface-to-air missile systems. The name refers to the fact that the missile itself is only a passive detector of a radar signal – provided by an external ...

 (SARH), giving a range of about 5 miles (8 km). About 4,000 rounds were produced. It was replaced in production by the GAR-1D (later AIM-4A), with larger control surfaces. About 12,000 of this variant were produced, the major production version of the SARH Falcon.

The GAR-2 (later AIM-4B) was a heat-seeker, generally limited to rear-aspect engagements, but with the advantage of being a 'fire and forget' weapon. As would also be Soviet
Soviet Union
The Soviet Union , officially the Union of Soviet Socialist Republics , was a constitutionally socialist state that existed in Eurasia between 1922 and 1991....

 practice, it was common to fire the weapon in salvos of both types to increase the chances of a hit (a heat-seeking missile fired first, followed moments later by a radar-guided missile). The GAR-2 was about 1.5 in (40 mm) longer and 16 lb (7 kg) heavier than its SARH counterpart. Its range was similar. It was replaced in production by the GAR-2A (later AIM-4C), with a more sensitive infrared seeker. A total of about 26,000 of the infrared-homing Falcons were built.
All of the early Falcons had a small 7.6 lb (3.4 kg) warhead, limiting their lethal radius. Also limiting them tactically was the fact that Falcon lacked a proximity fuze
Proximity fuze
A proximity fuze is a fuze that is designed to detonate an explosive device automatically when the distance to target becomes smaller than a predetermined value or when the target passes through a given plane...

: the fuzing for the missile was in the leading edges of the wings, requiring a direct hit to detonate.

In 1958
1958 in aviation
This is a list of aviation-related events from 1958:- Events :* Gulfstream Aerospace is founded in Savannah, Georgia, in the United States.* The Argentine Navy acquires its first aircraft carrier by purchasing HMS Warrior from the United Kingdom....

 Hughes introduced a slightly enlarged version of the Falcon, initially dubbed Super Falcon, with a more powerful, longer-burning rocket engine, increasing speed and range. It had a larger warhead (28.7 lb / 13 kg) and better guidance systems. The SARH versions were GAR-3 (AIM-4E) and the improved GAR-3A (AIM-4F). The infrared version was the GAR-4A (AIM-4G). About 2,700 SARH missiles and 3,400 IR Super Falcons were produced, replacing most earlier versions of the weapon in service.

The Falcon was redesignated AIM-4 in September 1962
1962 in aviation
This is a list of aviation-related events from 1962:- Events :* Early 1962 – In Operation High Jump, the United States Navy McDonnell F4H-1 Phantom II fighter sets a number of world climb-to altitude records: 34.523 seconds to 3,000 meters , 48.787 seconds to 6,000 meters , 61.629 seconds to...

.

The final version of the original Falcon was the GAR-2B (later AIM-4D), which entered service in 1963
1963 in aviation
This is a list of aviation-related events from 1963:- Events :* Violating a 1959 requirement that all aircraft operating from the aircraft carrier Minas Gerais - which never has operated aircraft - belong to the Brazilian Air Force, the Brazilian Navy establishes an air group of its own for the...

. This was intended as a fighter combat weapon, combining the lighter, smaller airframe of the earlier GAR-1/GAR-2 weapon with the improved IR seeker of the GAR-4A/AIM-4G.

A larger version of the Falcon carrying a 0.25-kiloton nuclear warhead
W54
The W54 was the smallest nuclear warhead deployed by the United States. It was a very compact implosion-type nuclear weapon design, designed for tactical use and had a very low yield for a nuclear weapon.- Development :...

 was developed as the GAR-11 (later designated the AIM-26 Falcon
AIM-26 Falcon
The AIM-26 Falcon was a larger, more powerful version of the AIM-4 Falcon air-to-air missile built by Hughes. It is the only guided U.S. air-to-air weapon with a nuclear warhead, though the unguided AIR-2 Genie was also nuclear-armed.-Development:...

), while a long-range version was developed for the XF-108 Rapier
XF-108 Rapier
The North American XF-108 Rapier was a proposed long-range, high-speed interceptor aircraft designed by North American Aviation. Initiated to defend the United States from supersonic Soviet bombers, the program, initially called NA-257, was cancelled in 1959 due to a shortage of funds and the...

 and the Lockheed YF-12
Lockheed YF-12
The Lockheed YF-12 was an American prototype interceptor aircraft, which the United States Air Force evaluated as a development of the highly-secret Lockheed A-12 that also spawned the SR-71 Blackbird.-Design and development:...

 interceptors as the GAR-9 (later AIM-47 Falcon
AIM-47 Falcon
The Hughes AIM-47 Falcon, originally GAR-9, was a very long-range high-performance air-to-air missile that shared the basic design of the earlier AIM-4 Falcon. It was developed in 1958 along with the new Hughes AN/ASG-18 radar fire-control system intended to arm the Mach 3 XF-108 Rapier interceptor...

).

Operational history

The USAF deployed AIM-4 in May 1967 during the Vietnam War
Vietnam War
The Vietnam War was a Cold War-era military conflict that occurred in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. This war followed the First Indochina War and was fought between North Vietnam, supported by its communist allies, and the government of...

 on the new F-4D Phantom II
F-4 Phantom II
The McDonnell Douglas F-4 Phantom II is a tandem two-seat, twin-engined, all-weather, long-range supersonic jet interceptor fighter/fighter-bomber originally developed for the United States Navy by McDonnell Aircraft. It first entered service in 1960 with the U.S. Navy. Proving highly adaptable,...

, which carried it on the inner wing pylons and was ostensibly not wired to carry the Navy-designed AIM-9 Sidewinder
AIM-9 Sidewinder
The AIM-9 Sidewinder is a heat-seeking, short-range, air-to-air missile carried mostly by fighter aircraft and recently, certain gunship helicopters. The missile entered service with United States Air Force in the early 1950s, and variants and upgrades remain in active service with many air forces...

. The missile's combat performance was very poor. The Falcon, already operational on Air Defense Command aircraft, was designed to be used against bombers and its slow seeker cooling times requiring as much as 6 to 7 seconds to obtain a lock on a target rendered it largely ineffective against maneuvering fighters. Moreover it could only be cooled once. Limited coolant supply meant that once cooled, the missile would expend its supply of liquid nitrogen
Liquid nitrogen
Liquid nitrogen is nitrogen in a liquid state at a very low temperature. It is produced industrially by fractional distillation of liquid air. Liquid nitrogen is a colourless clear liquid with density of 0.807 g/mL at its boiling point and a dielectric constant of 1.4...

 in two minutes, rendering it useless on the rail. The missile also had a small warhead, and lacked proximity fusing. As a result, only five kills were scored, all with the AIM-4D version. (The Falcon was also experimentally fired by the F-102 Delta Dagger
F-102 Delta Dagger
The Convair F-102 Delta Dagger was a US interceptor aircraft built as part of the backbone of the United States Air Force's air defenses in the late 1950s. Entering service in 1956, its main purpose was to intercept invading Soviet bomber fleets...

 against ground targets at night using its infrared seeker.)
The weapon was unpopular with pilots from the onset and was formally withdrawn in 1969
1969 in aviation
This is a list of aviation-related events from 1969:- Events :* The Canadian Snowbirds aerobatic team is formed.* A fifth annual Harmon Trophy is created to honor the worlds outstanding astronaut of the year and is awarded for the first time, honoring the outstanding astronauts of 1968.-January:*...

, to be replaced in the F-4D by the Sidewinder after retrofitting the proper wiring. Col. Robin Olds
Robin Olds
Robin Olds was an American fighter pilot and general officer in the U.S. Air Force. He was a "triple ace", with a combined total of 16 victories in World War II and the Vietnam War. He retired in 1973 as a brigadier general....

, commanding the F-4 Phantom II
F-4 Phantom II
The McDonnell Douglas F-4 Phantom II is a tandem two-seat, twin-engined, all-weather, long-range supersonic jet interceptor fighter/fighter-bomber originally developed for the United States Navy by McDonnell Aircraft. It first entered service in 1960 with the U.S. Navy. Proving highly adaptable,...

-equipped 8th Tactical Fighter Wing
8th Fighter Wing
The United States Air Force 8th Fighter Wing is the host unit at Kunsan Air Base, Republic of Korea and is assigned to Seventh Air Force...

, was an outspoken critic of the missile and said of it:
By the beginning of June, we all hated the new AIM-4 Falcon missiles. I loathed the damned useless things. I wanted my Sidewinders back. In two missions I had fired seven or eight of the bloody things and not one guided. They were worse than I had anticipated. Sometimes they refused to launch; sometimes they just cruised off into the blue without guiding. In the thick of an engagement with my head twisting and turning, trying to keep track of friend and foe, I'd forget which of the four I had (already) selected and couldn't tell which of the remaining was perking and which head was already expiring on its launch rail. Twice upon returning to base I had the tech rep go over the switchology and firing sequences. We never discovered I was doing anything wrong.


An effort to address the limitations of AIM-4D led to the development in 1970
1970 in aviation
This is a list of aviation-related events from 1970:-January:* January 1 – Nord-Aviation, Sud-Aviation, and SEREB merge to form SNIAS .* January 31 – Mikhail Mil dies, aged 61-February:...

 of the XAIM-4H, which had a laser proximity fuze
Proximity fuze
A proximity fuze is a fuze that is designed to detonate an explosive device automatically when the distance to target becomes smaller than a predetermined value or when the target passes through a given plane...

, new warhead, and better maneuverability. It was cancelled the following year without entering service.

The AIM-4F/AIM-4G Super Falcon remained in USAF and ANG
Air National Guard
The Air National Guard , often referred to as the Air Guard, is the air force militia organized by each of the fifty U.S. states, the commonwealth of Puerto Rico, the territories of Guam and the U.S. Virgin Islands, and the District of Columbia of the United States. Established under Title 10 and...

 service, primarily with F-102 Delta Dagger
F-102 Delta Dagger
The Convair F-102 Delta Dagger was a US interceptor aircraft built as part of the backbone of the United States Air Force's air defenses in the late 1950s. Entering service in 1956, its main purpose was to intercept invading Soviet bomber fleets...

 and F-106 Delta Dart
F-106 Delta Dart
The Convair F-106 Delta Dart was the primary all-weather interceptor aircraft for the United States Air Force from the 1960s through the 1980s. Designed as the so-called "Ultimate Interceptor", it has proven to be the last dedicated interceptor in USAF service to date...

 interceptors, until the final retirement of the F-106 in 1988
1988 in aviation
This is a list of aviation-related events from 1988:-January:* January 26 – The French Ministry of Defense approves full-scale development of the Dassault Rafale.* January 30 – A Boeing 747 sets a new around-the-world record of 36 hours 54 minutes....

.

The AIM-4C was also produced as the HM-58 for the Swiss Air Force
Swiss Air Force
The Swiss Air Force is the air component of the Swiss Armed Forces, established on July 31, 1914, as part of the Army and as of January 1966 an independent service.In peacetime, Dübendorf is the operational Air Force HQ...

 for use on Dassault Mirage III
Dassault Mirage III
The Mirage III is a supersonic fighter aircraft designed by Dassault Aviation during the late 1950s, and manufactured both in France and a number of other countries. It was a successful fighter aircraft, being sold to many air forces around the world and remaining in production for over a decade...

S, and the Swedish Air Force
Swedish Air Force
The Swedish Air Force is the air force branch of the Swedish Armed Forces.-History:The Swedish Air Force was created on July 1, 1926 when the aircraft units of the Army and Navy were merged. Because of the escalating international tension during the 1930s the Air Force was reorganized and expanded...

 (as the Rb 28) for the Saab 35 Draken.

Operators

  • Royal Canadian Air Force
    Royal Canadian Air Force
    The history of the Royal Canadian Air Force begins in 1920, when the air force was created as the Canadian Air Force . In 1924 the CAF was renamed the Royal Canadian Air Force and granted royal sanction by King George V. The RCAF existed as an independent service until 1968...

  • Canadian Forces
    Canadian Forces
    The Canadian Forces , officially the Canadian Armed Forces , are the unified armed forces of Canada, as constituted by the National Defence Act, which states: "The Canadian Forces are the armed forces of Her Majesty raised by Canada and consist of one Service called the Canadian Armed Forces."...


  • Finnish Air Force
    Finnish Air Force
    The Finnish Air Force is one of the branches of the Finnish Defence Forces. Its peacetime tasks are airspace surveillance, identification flights, and production of readiness formations for wartime conditions...

     - (Swedish built missiles)

  • Swedish Air Force
    Swedish Air Force
    The Swedish Air Force is the air force branch of the Swedish Armed Forces.-History:The Swedish Air Force was created on July 1, 1926 when the aircraft units of the Army and Navy were merged. Because of the escalating international tension during the 1930s the Air Force was reorganized and expanded...

     - (Licence built by SAAB)

 Switzerland
  • Swiss Air Force
    Swiss Air Force
    The Swiss Air Force is the air component of the Swiss Armed Forces, established on July 31, 1914, as part of the Army and as of January 1966 an independent service.In peacetime, Dübendorf is the operational Air Force HQ...


  • United States Air Force
    United States Air Force
    The United States Air Force is the aerial warfare service branch of the United States Armed Forces and one of the American uniformed services. Initially part of the United States Army, the USAF was formed as a separate branch of the military on September 18, 1947 under the National Security Act of...


  • Hellenic Air Force
    Hellenic Air Force
    The Hellenic Air Force, abbreviated to HAF is the air force of Greece. The mission of the Hellenic Air Force is to guard and protect Greek airspace, provide air assistance and support to the Hellenic Army and the Hellenic Navy, as well as the provision of humanitarian aid in Greece and around the...


  • Turkish Air Force
    Turkish Air Force
    The Turkish Air Force is the aerial warfare service branch of the Turkish Armed Forces. It ranks 3rd in NATO in terms of fleet size behind the USAF and Royal Air Force with a current inventory of 798 aircraft .-Initial stages:...


Specifications (GAR-1D/ -2B / AIM-4C/D)

  • Length: 78 in (2 m) / 79.5 in (2 m)
  • Wingspan: 20 in (508 mm)
  • Diameter: 6.4 in (162.6 mm)
  • Weight: 119 lb (54 kg) / 135 lb (61.2 kg)
  • Speed: Mach 3
  • Range 6 mi (9.7 km)
  • Guidance: semi-active radar homing
    Semi-active radar homing
    Semi-active radar homing, or SARH, is a common type of missile guidance system, perhaps the most common type for longer-range air-to-air and surface-to-air missile systems. The name refers to the fact that the missile itself is only a passive detector of a radar signal – provided by an external ...

     / rear-aspect infrared
    Infrared
    Infrared light is electromagnetic radiation with a wavelength longer than that of visible light, measured from the nominal edge of visible red light at 0.74 micrometres , and extending conventionally to 300 µm...

  • Warhead: 7.6 lb (3.4 kg) high explosive

See also

Related Development:
  • AIM-26 Falcon
    AIM-26 Falcon
    The AIM-26 Falcon was a larger, more powerful version of the AIM-4 Falcon air-to-air missile built by Hughes. It is the only guided U.S. air-to-air weapon with a nuclear warhead, though the unguided AIR-2 Genie was also nuclear-armed.-Development:...

  • AIM-47 Falcon
    AIM-47 Falcon
    The Hughes AIM-47 Falcon, originally GAR-9, was a very long-range high-performance air-to-air missile that shared the basic design of the earlier AIM-4 Falcon. It was developed in 1958 along with the new Hughes AN/ASG-18 radar fire-control system intended to arm the Mach 3 XF-108 Rapier interceptor...

  • AIM-54 Phoenix
    AIM-54 Phoenix
    The AIM-54 Phoenix is a radar-guided, long-range air-to-air missile , carried in clusters of up to six missiles on F-14 Tomcats, its only launch platform. The Phoenix was the United States' only long-range air-to-air missile. The weapons system based on Phoenix was the world's first to allow...


Reference

Notes
Bibliography
  • The history of the Falcon missile, and its various configurations, is examined in Gart, Jason H. "Electronics and Aerospace Industry in Cold War Arizona, 1945-1968: Motorola, Hughes Aircraft, Goodyear Aircraft." Phd diss., Arizona State University, 2006.
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