Lockheed YF-12

National Museum of USAF 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 CIA's highly-secret A-12 OXCART that also spawned the now-famous SR-71 Blackbird.

Design and development

The United States Air Force (USAF) YF-12 program was a development of the Lockheed A-12 OXCART spy plane designed for the CIA and first flown 26 April 1962, the first YF-12A flew on 7 August 1963. The existence of the aircraft was not officially revealed until 29 February 1964. Lockheed was able to interest the Air Force in the project after the United States Air Force had been forced to cancel the XF-108 Rapier, a Mach 3-capable interceptor intended to replace the F-106 Delta Dart in service. It was pointed out that an aircraft based on the A-12 would provide a less costly alternative to the XF-108, since much of the design and development work on the YF-12 had already been done and paid for. In 1960, the USAF agreed to take the 11th through 13th slots on the A-12 production line and have them completed in the YF-12A interceptor configuration.

The main changes involved modifying the aircraft's nose to accommodate the Hughes AN/ASG-18 fire-control radar originally developed for the XF-108, and the addition of a second cockpit for a crewmember to operate the fire control radar. The nose modifications changed the aircraft's aerodynamics enough to require ventral fins to be mounted under the fuselage and engine nacelles to maintain stability. Finally, bays previously used to house the A-12's reconnaissance equipment were converted to carry four Hughes AIM-47A (GAR-9) missiles.

SPECIFICATIONS:

Span: 55 ft. 7 in.
Length: 101 ft.
Height: 18 ft. 6 in.
Weight: 127,000 lbs. loaded
Armament: Three Hughes AIM-47A missiles
Engines: Two Pratt & Whitney J58s of 32,000 lbs. thrust each with afterburner
Crew: Two

PERFORMANCE:
Maximum speed: Mach 3+
Range: 2,000+ miles
Service ceiling: Above 80,000 ft.

Plant 42

United States Air Force Plant 42 is a federally owned military aerospace facility in Palmdale, California where aerospace contractors share a common runway complex, and either lease building space from the Air Force, or own their own building outright (commonly referred to as GOCO, or Government Owned Contractor Operated). There are eight separate production sites specially suited for advanced technology and/or "black" program projects. Currently the most well known contractors at Plant 42 are Boeing, Lockheed Martin, and Northrop Grumman.



Located in the southern Antelope Valley, Plant 42 is strategically located near Los Angeles area defense and aerospace contractor companies, as well as Edwards Air Force Base's high-speed test corridors used under the direction of the base's Air Force Flight Test Center (AFFTC). It is 65 miles (105 km) from the LA Civic Center and 37 miles (60 km) from Edwards' flightline.


Current projects

* B-2 Spirit
* F-22 Raptor
* F-35 Joint Strike Fighter (JSF)
* F-117A Nighthawk
* U-2
* B-52
* Global Hawk

Past projects

* Each of the Space Shuttles
* Modernization of the Space Shuttle Columbia's cockpit area
* Lockheed L-1011 Tristar passenger jet
* B-1 Lancer Bomber
* XB-70
* X-15
* SR-71 Blackbird

The property now called Plant 42 was first activated as an emergency air landing strip in 1940 prior to the entry of the United States in World War II. It also provided B-25 training to military aviators during the war. Declared surplus by the federal government in 1946, it became a commercial airport for Los Angeles County. The outbreak of the Korean War in 1950 caused the Air Force to reactivate the property for use in final assembly and flight testing of military jet aircraft.

Both the U. S. Air Force and its aircraft contractors needed a location away from major population centers - due to sonic booms, other noises and security concerns - but close enough to the major centers of aircraft design and production, while having excellent flying weather the year around. The land which became Plant 42 fit the bill perfectly from the perspectives of all the concerned interests in military aircraft and national defense. Consequently, the Air Force agreed to purchase the land from Los Angeles County in 1951. Lockheed put together a master plan for the property per its Air Force contract, and after the approval of this master plan in 1953, the County transferred ownership of the land to the Federal Government in 1954. Since then Lockheed, looked upon with favor by the Air Force at this time, established its permanent presence at Plant 42. Its first step in doing so was to sign a lease in 1956 for 237 acres (1 km²) for use in its Air Force support programs of manufacturing aircraft and flight testing.

SR-71 Blackbird

SR-71 Blackbird - Wikipedia

The Lockheed SR-71 was an advanced, long-range, Mach 3 strategic reconnaissance aircraft developed from the Lockheed YF-12A and A-12 aircraft by the Lockheed Skunk Works. The SR-71 was unofficially named the Blackbird; its crews often called it the Sled, or the Habu ("snake"). The SR-71 line was in service from 1964 to 1998. Clarence "Kelly" Johnson was the man behind many of the design's advanced concepts. The SR-71 was one of the first aircraft to be shaped to reduce radar cross section. However, the aircraft was not stealthy and still had a large enough radar signature to be tracked by contemporary systems. The aircraft's defense was its high speed and operating altitude; if a surface-to-air missile launch was detected, the standard evasive action was to simply accelerate. Thirteen aircraft are known to have been destroyed, all for non-combat related reasons.

The SR-71 remained the world's fastest and highest-flying operational manned aircraft throughout its career. From an altitude of 80,000 ft (24 km) it could survey 100,000 square miles per hour (72 square kilometers per second) of the Earth's surface. On 28 July 1976, an SR-71 broke the world record for its class: an absolute speed record of 2,193.1669 mph (3,529.56 km/h), and a US "absolute altitude record" of 85,068.997 feet (25,929 m).

NASA Dryden SR-71 Blackbird

sr-71.org

SR-71s in USA