Historic California Posts, Camp, Stations and Airfields
Los Angeles Defense Area Site LA-78
Launch Area (LA-78L), circa 1966
The United States Army acquired a total of 144.63 acres (137.77 acres in fee and 6.86 acres in easements) in the Santa Monica Mountains for its own use. The acreage was acquired from
various private owners by purchase or declaration of taking, from 19 September 1955 to 19 January 1962. The site was developed as set forth by the Land Requirements for the Nike-Hercules Project in the Los Angeles Defense Area. The site was initial armed with the Nike-Ajax, and later, the Nike-Hercules missile systems.

The site was improved by the Army and known as Los Angeles Defense Area Site LA-78. The facilities included an administrative area (LA-78A), launcher area (LA-78L), integrated fire control area (LA-78C), an electrical distribution system and maintenance type facilities with interests in water line and roadway easement improvements. The administrative area has 13 buildings, the launcher area has 14 buildings, and the control area has 10 buildings.

The Nike Air Defense System was phased out on 4 February 1974. The 6.86 acres of easements were reported in excess from 1961 to 1975 and conveyed to individuals and corporations subject to existing easements for public highways, roads, pipeline, and public utilities. The 137.77 fee acreage was reported excess on 13 September 1974 and was transferred to the National Park Service on 23 January 1974. The Transfer and Acceptance of Military Real Property form for the fee acreage states that the property, with all improvements, is hereby transferred as-is, where-is and the transferring agency makes no warranty as to the condition or quantity thereof.
Integrated Fire Control Area (LA-78C) circa 1966
Army units that have garrissoned site were:
Administrative Area (LA-78L) circa. The battery's mess hall in in the foreground while the battery headquarters is in the background. One wing of the battery barracks in shown on the right.
Source: Los Angeles District, US Army Corps of Engineers, History compiled in 1999.
Posted 15 February 2015
Nike-Ajax (left) and Nike-Hercules (right Missiles (NARA)

The Western Electric SAM-A-7/M1/MIM-3 Nike Ajax

The Nike Ajax was the world's first operational surface-to-air guided missile system. Its origins lay in the immediate post-war time, when the U.S. Army realized that guided missiles were the only way to provide air-defense against future fast high-flying bombers. Western Electric became the prime contractor for the XSAM-G-7 Nike missile system and Douglas as the primary subcontractor was responsible for the missile airframe.

The first unguided Nike missiles were fired in 1946, but problems with the original multi-rocket booster (eight solid-fuel rockets wrapped around the missile tail) soon led to delays in the program. In 1948, it was decided to replace this booster pack with a single rocket booster, attached to the back of the missile. The main propulsion of the missile was a Bell liquid-fueled rocket motor, and the flight path was controlled by the four small fins around the nose. In November 1951, the first successful interception of a QB-17 target drone succeeded. The first production Nike (which had been redesignated SAM-A-7 in 1951) flew in 1952, and the first operational Nike site was activated in 1954. By this time, the missile had been designated by the Army as Guided Missile, Anti-Aircraft M1. The name had changed to Nike I, to distinguish it from the Nike-B (later MIM-14 Nike Hercules) and Nike II (later LIM-49 Nike Zeus). On 15 November 1956, the name was finally changed to Nike Ajax.

The Nike Ajax missile used a command guidance system. An acquisition radar called LOPAR (Low-Power Acquisition Radar) picked up potential targets at long range, and the information on hostile targets was then transferred to the Target Tracking Radar (TTR). An adjacent Missile Tracking Radar (MTR) tracked the flight path of the Nike Ajax missile. Using tracking data of the TTR and MTR, a computer calculated the interception trajectory, and sent appropriate course correction commands to the missile. The three high-explosive fragmentation warheads of the missile (in nose, center, and aft section) were detonated by ground command, when the paths of target and missile met.

One of the major disadvantages of the Nike Ajax system was that the guidance system could handle only one target at a time. Additionally, there was originally no data link between different Nike Ajax sites, which could lead to several sites engaging the same target. The latter problem was eventually solved by the introduction of the Martin AN/FSG-1 Missile Master command-and-control system, with automatic data communication and processing. Other problematic features of the Nike Ajax system were the liquid-fuel rocket motor with its highly toxic propellants, and the large size of a complete site with all components, which made Nike Ajax to all intents and purposes a fixed-site air defense system.

By 1958, nearly 200 Nike Ajax sites had been activated in the United States. However, the far more advanced MIM-14 Nike Hercules soon replaced the Nike Ajax, and by late 1963, the last Nike Ajax on U.S. soil had been retired. In 1963, the Nike Ajax had received the new designation MIM-3A. Despite the use of an MIM (Mobile Intercept Missile) designator, the mobility of the Nike Ajax system was more theoretical than actually feasible in a combat situation.

The MIM-3A continued to serve with U.S. overseas and friendly forces for many more years. In total, more than 16,000 missiles were built.
Western Electric SAM-A-25/M6/MIM-14 Nike Hercules

The Nike Hercules was the only nuclear-armed surface-to-air weapon, which was operational with the U.S. Army. Development of an improved Nike missile began in 1952, with the primary goal to develop a missile with a significantly higher performance than MIM-3 Nike Ajax (then known simply as Nike), which could still be used with the existing Nike ground equipment. After it had been shown that the Nike Ajax could not be equipped with then existing nuclear warheads, nuclear armament became another goal for the new missile. The SAM-A-25 Nike B program was formally established in June 1953. As with Nike Ajax, Western Electric was prime contractor, and Douglas was responsible for the missile airframe.

The Nike B (renamed Nike Hercules on 15 December 1956) used many components of the Nike I (Nike Ajax). The booster consisted of four Nike Ajax boosters, and the original design used 4 of Ajax' liquid-fuel rockets as sustainer propulsion. However, the first flight tests with the liquid-fuel sustainer in 1955 proved very troublesome, and a solid-fueled sustainer rocket was eventually used. The first successful interception of a drone target occurred in 1956, and in 1957 the new solid-fuel sustainer flew for the first time. Nike Hercules used the same command guidance as the MIM-3 Nike Ajax, with essentially the same ground components.

The first production Nike Hercules missiles were delivered in 1958, and quickly replaced the Ajax on many Nike sites. By then, the Nike Hercules had been designated as Guided Missile, Air Defense M6. The M6 could be equipped with either an M17 (a.k.a. T45) blast-fragmentation warhead, or a W-31 nuclear fission warhead with yield selectable as 2 kT or 40 kT. The missile performance was such that even very high-flying bombers could not escape the Nike Hercules. Capability against low-level targets remained rather limited, however.

As the Nike Hercules began replacing the older Nike Ajax, work was underway to improve the acquisition and tracking radar capabilities to fully exploit the missile's greater performance. The major improvement in what was called the Improved Hercules system was the new L-band acquisition radar, called HIPAR (High-Power Acquisition Radar). The TTR (Target Tracking Radar) and TRR (Target Ranging Radar) were also improved, having better ECM resistance. The missiles of the improved Improved Hercules system were designated as M6A1. In June 1960, an Improved Hercules achieved the world's first successful interception of a ballistic guided missile, when a MGM-5 Corporal SRBM was shot down. The new radars were also far more compact than the original ones, which made moving a Nike site a least somewhat practical for the first time. Lastly, Improved Hercules introduced a viable surface-to-surface capability to the Nike system. The first Improved Hercules systems were installed at Nike sites in June 1961.

In 1963, the M6 and M6A1 missiles were redesignated as MIM-14A and MIM-14B, respectively. The MIM-14C (introduced in 1972) was a modified MIM-14B with an improved missile guidance section for higher maneuverability and better ECM resistance.

All in all, the U.S. Army established 145 Nike Hercules sites over the years. Production of the nuclear-armed missiles ended in 1964, and gradual phase-out of the MIM-14 began in the late 1960's. The Army originally planned to replace the Nike with the new MIM-104 Patriot missile, but this plan was not implemented in the USA. Therefore, after the last active Nike Hercules sites in the continental U.S. had been deactivated in 1974, there are no long-range air-defense missiles fielded in the U.S.. In Europe, the U.S. Army retired its last MIM-14 units in 1984, when the MIM-104 Patriot was introduced.

In total, more than 25000 Nike Hercules missiles of all versions were produced, most being of the MIM-14B variant.

Source: Directory of U.S. Missiles and Rockets, http://www.designation-systems.net/

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Updated 8 February 2016