Nike Missile System Overview
Nike, named for the mythical Greek goddess of victory, was the name given to a program which ultimately produced the world's first successful, widely-deployed, guided surface-to-air missile system. Planning for Nike was begun during the last months of the Second World War when the U.S. Army realized that conventional anti-aircraft artillery would not be able to provide an adequate defense against the fast, high-flying and maneuverable jet aircraft which were being introduced into service, particularly by the Germans.
During 1945, Bell Telephone Laboratories produced the "AAGM (Anti Aircraft Guided Missile) Report" in which the concept of the Nike system were first outlined. The Report envisioned a two-stage, supersonic missile which could be guided to its target by means of ground-based radar and computer systems. This type of system is known as a "command" guidance system. The main advantage over conventional anti-aircraft artillery was that the Nike missile could be continuously guided to intercept an aircraft, in spite of any evasive actions taken by its pilot. By contrast, the projectiles fired by conventional anti-aircraft artillery (such as 90mm and 120mm guns) followed a predetermined, ballistic trajectory which could not be altered after firing.
The Nike Mission
During the first decade of the Cold War, the Soviet Union began to develop a series of long-range bomber aircraft, capable of reaching targets within the continental United States. The potential threat posed by such aircraft became much more serious when, in 1949, the Russians exploded their first atomic bomb.
The perception that the Soviet Union might be capable of constructing a sizable fleet of long-range, nuclear-armed bomber aircraft capable of reaching the continental United States provided motivation to rapidly develop and deploy the Nike system to defend major U.S. population centers and other vital targets. The outbreak of hostilities in Korea, provided a further impetus to this deployment.
The mission of Nike within the continental U.S was to act as a "last ditch" line of air defense for selected areas. The Nike system would have been utilized in the event that the Air Force's long-range fighter-interceptor aircraft had failed to destroy any attacking bombers at a greater distance from their intended targets.
Within the continental United States, Nike missile sites were constructed in defensive "rings" surrounding major urban and industrial areas. Additional Nike sites protected key Strategic Air Command bases and other sensitive installations, such as the nuclear facilities at Hanford, Washington. Sites were located on government-owned property where this was available (for example, on military bases). However, much real estate needed to be acquired in order to construct sufficient bases to provide an adequate defense. This was a sometimes difficult and contentious process. Often, the federal government had to go to court in order to obtain the property needed for such sites.
The exact number of Nike sites constructed within a particular "defense area" varied depending upon many factors. The New York Defense Area -- one of the largest in the nation -- was defended at one time by nearly twenty individual Nike installations. Due to the relatively short range of the original Nike missile, the Nike "Ajax", many bases were located relatively close to the center of the areas they protected. Frequently, they were located within heavily populated areas.
Nike Ajax missiles first became operational at Fort Meade, Maryland, during December, 1953. Dozens of Nike sites were subsequently constructed at locations all across the continental United States during the mid fifties and early sixties. Roughly 250 sites were constructed during this period. Nike missiles were also deployed overseas with U.S. forces in Europe and Asia, by the armed forces of many NATO nations (Germany, France, Denmark, Italy, Belgium, Norway, the Netherlands, Greece and Turkey), and by U.S. allies in Asia (Japan, South Korea, and Taiwan).
A Typical Nike Missile Site
A typical Nike air defense site consisted of two separate parcels of land. One area was known as the Integrated Fire Control (IFC) Area. This site contained the Nike system's ground-based radar and computer systems designed to detect and track hostile aircraft, and to guide the missiles to their targets.
The second parcel of land was known as the Launcher Area. At the launcher area, Nike missiles were stored horizontally within heavily constructed underground missile magazines. A large, missile elevator brought the Nikes to the surface of the site where they would be pushed (manually) by crewmen, across twin steel rails to one of four satellite launchers. The missile was then attached to its launcher and erected to a near-vertical position for firing. The near-vertical firing position ensured that the missile's booster rocket (lower stage) would not crash directly back onto the missile site, but, instead, would land within a predetermined booster impact area.
The control and launcher areas were separated by a distance of 1,000 to 6,000 yards (roughly 0.5- to 3.5-miles) and were often located within different townships. Technical limitations of the guidance system required the two facilities to be separated by a minimum of 3,000 feet. Whenever possible, control areas were constructed on high ground in order to gain superior radar coverage of the area. Control areas were generally located between the area being defended and the launcher area containing the missiles.
Nike Ajax: The First Nike Missile
The first successful test firing of a Nike missile occurred during 1951. This first Nike missile was later given the name Nike "Ajax". Nike Ajax was a slender, two-stage guided missile powered by a liquid-fueled motor utilizing a combination of inhibited red fuming nitric acid (IRFNA), unsymmetrical dimethyl hydrazine (UDMH) and JP-4 jet petroleum. The Ajax was blasted off of its launcher by means of a jettisonable solid fuel rocket booster which fired for about 3 seconds, accelerating the missile with a power of 25 times the force of gravity.
The Ajax missile was capable of maximum speeds of over 1,600-mph and could reach targets at altitudes of up to 70,000 feet. Its range was only about 25 miles, which was too short to make it a truly effective air defense weapon in the eyes of its many detractors. Its supporters countered that the new missile was markedly superior to conventional antiaircraft artillery, and that it was, significantly, the only air defense missile actually deployed and operational at that time.
Nike Ajax was armed with three individual high-explosive, fragmentation-type warheads located at the front, center and rear of the missile body. Although consideration was given to arming the Ajax with a nuclear (atomic) warhead, this project was canceled in favor of developing a totally new, much-improved Nike missile. Even as the first Nike Ajax missiles were being deployed across the nation, work on its successor, first known as "Nike-B" and later as Nike "Hercules" had already begun.
The Nike Hercules Missile
Work on a successor to the first Nike missile, the Nike Ajax, was initiated well before the first Ajax missiles were deployed at tactical sites across the nation. Two major considerations drove the development of the this second-generation Nike missile. The first was a requirement to produce a missile with improved speed, range and altitude capabilities to defend against a new generation of faster and smaller aerial targets, in particular, supersonic aircraft and cruise missiles. The second requirement was the desire to arm this new missile with a powerful atomic warhead to ensure destruction of the target aircraft and the destruction of disabling of any nuclear weapons it carried.
Originally designated as "Nike B", the Nike "Hercules" was a far more capable missile than its predecessor (the Nike Ajax) in nearly every way. With a maximum range of about 90 miles, maximum speeds in excess of 2,700 mph, and the ability to reach targets at altitudes of up to 150,000 feet, the Nike Hercules was a highly potent air defense weapon. The Hercules missile lacked most of the complex, miniaturized vacuum tubes utilized by the Ajax missile. It also employed solid rocket fuel in its "sustainer" motor made the missile both easier and safer to handle than the Ajax which employed highly caustic liquid fuel components.
Unlike the Ajax, the Hercules missile was designed from the outset to carry a nuclear warhead. Designated "W-31" the Hercules nuclear warhead was available in three different yields: low yield (3-Kilotons); medium yield (20-Kilotons) and high yield (30-Kilotons.). A Kiloton (Kt.) represents the explosive force of 1,000 tons of TNT. For purposes of comparison, the atomic bomb dropped on Hiroshima, Japan, near the end of the Second World War had a yield of approximately 15 Kilotons.
Armed with its nuclear warhead a single Nike Hercules missile was capable of destroying a closely spaced formation of several attacking aircraft. However, defending against mass formations of aircraft was not the only reason for deploying atomic warheads on the Hercules missiles. Instead, the atomic capability provided an enhanced capacity for destroying or disabling the nuclear weapons carried aboard an aircraft, helping to ensure that there would be no nuclear detonation of these devices.
Deployment of the first nuclear-armed Nike Hercules missiles was made on an emergency basis within the continental United States. Because sufficient quantities of the W-31 warhead were not available in early 1958, some of these missiles were initially equipped with an already available, although somewhat heavier, nuclear warhead designated "W-7".
The Hercules missile could also be equipped with a powerful, high-explosive, fragmentation-type warhead designated "T-45". This warhead provided a useful alternative to the atomic W-31 warhead. For example, a conventional Hercules missile could have been used to engage a single U-2 type Soviet reconnaissance aircraft, a circumstance when the nuclear capability would have been excessive. Very limited numbers of conventional Nike Hercules missiles were deployed at Nike missile sites within the continental United States. The vast majority of these missiles were, however, nuclear-tipped.
Additional warhead designs, including "cluster" type warheads containing numerous submunitions, were developed although not deployed operationally on the Nike Hercules missile.
More sophisticated radar and guidance systems were also part of the Nike Hercules "package". These made the Hercules system more accurate and effective at longer ranges. During the early sixties, an "Improved" version of the Nike Hercules missile system, utilizing ABAR (Alternate Battery Acquisition Radar) or HIPAR (High Power Acquisition Radar) was deployed. The improved radar capabilities and other advanced electronic features of the Improved Nike Hercules system made it more effective against small, supersonic targets including aircraft and aircraft launched "stand-off" or "cruise" missiles. A variant of the system provided a limited capability to defend against tactical ballistic missiles.
An relatively unknown fact is that the Hercules missile could also be used in a surface-to-surface mode. In this role, the Hercules would have been used to deliver tactical nuclear warheads to destroy concentrations of enemy troops and armored vehicles, or bridges, dams and other significant targets from bases and field deployments located primarily within Western Europe. This surface capability might also have proven useful in other areas where the Hercules missile was deployed including South Korea, Taiwan, and Turkey. The potential use of Hercules missiles against ships or submarines from coastal sites in the continental United States also appears to have been considered.
Maximum range of the Hercules missile in the surface-to-surface mode was 114 miles, and was limited by the effective transmission range of the Missile Tracking Radar (MTR).
Although deployed at permanent sites within the continental United States, and at many overseas locations, mobile Nike Hercules batteries increased the flexibility and usefulness of this system, permitting the powerful capabilities of this versatile missile system to be extended wherever this could prove useful. Trucks and trailers were used to transport Nike Hercules system components to the desired field locations. In this mode, a single missile was mounted upon a truck-drawn trailer/launcher unit which also served as a firing platform.
Guidance & Control
Unlike some modern missile systems, Nike was guided entirely from the ground, from firing to warhead detonation. The electronic "eyes" (radar) and "brain" (computer) of the Nike system were located on the ground, within the Intergrated Fire Control or IFC Area.
Within the IFC area, hostile aircraft were first identified by means of an acquisition radar. This rotating, search-type radar enabled the missile battery to detect aircraft and to positively identity friendly or hostile aircraft by means of electronic signals generated by either IFF ("Identification Friend or Foe") or SIF ("Selective Identification Feature") equipment.
Target information would normally have been derived from regional Army air defense control centers. These facilities received information about incoming hostile aircraft from the Air Force's nationwide air defense radar network. The regional control centers determined which aerial targets were to be fired on by individual Nike missile batteries. The advent of the Air Force's partly-automated, nationwide SAGE (Semi Automatic Ground Environment) air defense network and the deployment of the Army's own Missile Master system (and similar, follow-on fire distribution systems), enabled faster and more accurate coordination within this Cold War era system of air defenses.
Having acquired and positively identified a hostile aircraft, a second radar, the Target Tracking Radar (TTR) would be aimed at and electronically locked onto it. This radar would then follow the selected aircraft's every move in spite of any evasive action taken by its pilot. A third radar, the Missile Tracking Radar (MTR) was then aimed at and electronically locked onto an individual Nike missile located at the nearby Launcher Area.
Both the TTR and MTR were linked to a guidance computer located within the Battery Control Trailer at the IFC Area. This analog computer continuously compared the relative positions of both the target aircraft and the missile during its flight and determined the best course the missile would have to fly in order to reach its intended target. Steering commands were computed and sent from the ground to the missile during its flight, via the Missile Tracking Radar. At the moment of closest approach the missile's warhead would be detonated by a computer generated "burst command" sent from the ground via the MTR.
For surface-to-surface shots, the coordinates of the target were dialed into the computer and the height of burst was set by crew members at the Launcher Area. The standard technique was for the missile's guidance signal to be terminated as it dove vertically onto its target. Detonation of the warhead was via the pre-set barometric fusing. Alternately (and presumably as a back-up system) the warhead could be exploded via contact fusing when it impacted the selected target or target area.
End Of The Nike Era
Although Nike was created in response to Soviet efforts to design and deploy long-range bomber aircraft during the early years of the Cold War, Soviet military strategy soon changed. By the late 1950s, fearing that their manned aircraft would be too vulnerable to attack by American interceptor aircraft armed with rockets and missiles, the Soviet Union focused more of its attention on developing ICBMs or Intercontinental Ballistic Missiles against which there existed, at that time, no effective defense. The Soviet long-range strategic bomber force continued to operate throughout the Cold War. However, these forces never achieved the size or capabilities of their American counterpart, the U.S. Air Force's Strategic Air Command or SAC.
The shifting nature of the Soviet threat meant that the air defense role, for which Nike was originally intended, became relatively less critical as time passed. Defense dollars were needed for other projects (including the development of American ICBMs and potential missile defenses) and also to fund the rapidly growing war in Vietnam. As a result, beginning in the mid 1960s, the total number of operational Nike bases within the continental U.S. was fairly steadily reduced, on an almost annual basis. All Nike Ajax sites in the continental United States were closed down by 1964. Closures of select Nike Hercules sites began during the mid 1960s.
During 1974, all remaining operational sites within the nationwide Nike air defense system were inactivated. Army Air Defense Command (ARADCOM) which administered this system was closed down shortly thereafter. The deactivation of the nationwide Nike missile system signaled the end of one of the nation's most significant, highly visible and costly Cold War air defense programs. end.
Despite the termination of the nationwide Nike program in the United States, Nike missiles remained operational at a small number of sites in southern Florida and in Alaska for several more years. Nike missiles also remained operational with U.S. forces in Europe and the Pacific, and with the armed forces of many U.S. Allies overseas. Although no longer in the U.S. inventory, more than four decades after the first Nike missile became operational in the U.S., Nike Hercules missiles are today deployed by the armed forces of Italy, Greece, Turkey and South Korea.