Tag Archives: Lockheed SR-71A-LO

9 October 1999

9 October 1999: At a Saturday air show at Edwards Air Force Base, California, NASA Research Pilot Rogers E. Smith and Flight Test Engineer Robert R. Meyer, Jr., flew Lockheed SR-71A-LO 61-7980, NASA 844, on what would be the very last flight of a Blackbird. Although it was scheduled to fly again for the Sunday air show, a serious fuel leak prevented that flight.

61-7980 (Lockheed serial number 2031) was the final SR-71A to be built.

NASA 844 was retired after the final flight and placed in flyable storage, but in 2002, it was placed on static display at the Dryden Flight Research Center,¹ Edwards Air Force Base, California.EC92-02273 

¹ In 2014, DFRC was renamed the NASA Neil A. Armstrong Flight Research Center (AFRC).

© 2017, Bryan R. Swopes

Facebooktwittergoogle_plusredditpinterestlinkedinmailby feather

1 September 1974

Lockheed SR-71A-LO 61-7972 at the Steven F. Udvar-Hazy Center, Smithsonian Institution National Air and Space Museum. (NASM)

1 September 1974: Major James V. Sullivan, USAF, Pilot and Major Noel F. Widdifield, USAF, Reconnaissance Systems Officer, set a Fédération Aéronautique Internationale (FAI) World Record for Speed Over A Known Course when they flew a Lockheed SR-71A-LO, serial number 61-7972, from New York to London in 1 hour, 54 minutes, 56.4 seconds. They averaged 2,908.026 kilometers per hour (1,806.964 miles per hour).

Lockheed SR-71A-LO 61-7972 FAI speed record certificate

This same SR-71 set numerous speed and altitude records during its career. It is in the collection of the Smithsonian Institution National Air and Space Museum.

© 2015, Bryan R. Swopes

Facebooktwittergoogle_plusredditpinterestlinkedinmailby feather

6 March 1998

Into the sunset....
Into the sunset….

6 March 1998: Secretary of Defense William S. Cohen approved the permanent retirement of the Lockheed SR-71A “Blackbird” Mach 3+ strategic reconnaisance aircraft.

With that decision, the U.S. Air Force would retire two SR-71A models (returned to active duty in 1995), an SR- 71A and the SR-71B trainer model on loan to NASA, and two from returnable storage.

© 2015, Bryan R. Swopes

Facebooktwittergoogle_plusredditpinterestlinkedinmailby feather

22 December 1964

The first Lockheed SR-71A, 61-7950, takes of fo rthe first time at Air Force Plant 42, Palmdale, California. (Lockheed)
The first Lockheed SR-71A, 61-7950, takes off for the first time at Air Force Plant 42, Palmdale, California. An F-104 Starfighter follows as chase. (Lockheed Martin via habu.org)

22 December 1964: Lockheed test pilot Robert J. “Bob” Gilliland made a solo first flight of the first SR-71A, 61-7950, at Air Force Plant 42, Palmdale, California. The “Blackbird” flew higher than 45,000 feet (13,716 meters) and more than 1,000 miles per hour (1,609 kilometers per hour) before landing at Edwards Air Force Base, 22 miles (35 kilometers) northeast, to begin the flight test program.

Bob Gilliland made the first flight of every Lockheed SR-71 as they were produced. It is reported that he has logged more flight time in excess of Mach 3 than any other pilot.

Robert J. Gillilan (Lockheed)
Blackbird test pilot Robert J. Gilliland, with a Lockheed SR-71A. Gilliland is wearing an S901J full-pressure suit made by “Northeast Manufacturing” (the David Clark Co.) (Lockheed Martin)

The SR-71A Blackbird is a Mach 3+ strategic reconnaissance aircraft designed and built by Lockheed’s famous (but Top Secret) “Skunk Works” for the United States Air Force. It was developed from the Central Intelligence Agency’s A-12 Oxcart program.

The SR-71A is a two-place aircraft, operated by a Pilot and a Reconnaissance Systems Officer (“RSO”). It uses electronic and optical sensors. The fuselage has a somewhat flattened aspect with chines leading forward from the wings to the nose. The wings are a modified delta, with integral engine nacelles. Two vertical stabilizers are mounted at the aft end of the engine nacelles and cant inward toward the aircraft centerline.

The SR-71A is 107 feet, 5 inches (32.741 meters) long with a wingspan of 55 feet, 7 inches (16.942 meters), and overall height of 18 feet, 6 inches (5.639 meters). Its empty weight is 67,500 pounds (30,620 kilograms) and maximum takeoff weight is 172,000 pounds (78,020 kilograms).

Lockheed SR-71A 61-7950 in flight. (U.S. Air Force)
Lockheed SR-71A 61-7950 in flight. (U.S. Air Force)

The Blackbird is powered by two Pratt & Whitney JT11D-20 (J58-P-4) turbo-ramjet engines, rated at 25,000 pounds of thrust (111.21 kilonewtons) and 34,000 pounds of thrust (151.24 kilonewtons) with afterburner. The exhaust gas temperature is approximately 3,400 °F. (1,870 °C.). The J58 is a single-spool, axial-flow engine which uses a 9-stage compressor section and 2-stage turbine. The J58 is 17 feet, 10 inches (7.436 meters) long and 4 feet, 9 inches (1.448 meters) in diameter. It weighs approximately 6,000 pounds (2,722 kilograms).

The SR-71A has a maximum speed of Mach 3.3 at 80,000 feet (24,384 meters)—2,199 miles per hour (3,539 kilometers per hour). Its maximum rate of climb is 11,810 feet per minute (60 meters per second), and the service ceiling is 85,000 feet (25,908 meters). The Blackbird’s maximum unrefueled range is 3,680 miles (5,925 kilometers).

Lockheed built 32 SR-71As. They entered service with the 4200th Strategic Reconnaissance Wing (later redesignated the 9th SRW) in 1966 and were initially retired in 1989. Several were reactivated in 1995, but finally retired in 1999.

Lockheed SR-71A-LO 61-7950 was lost to fire during a brake system test at Edwards AFB, 10 January 1967.
Lockheed SR-71A-LO 61-7950 was lost to fire during a brake system test at Edwards AFB, 10 January 1967. (Lockheed Martin via habu.org)

© 2016, Bryan R. Swopes

Facebooktwittergoogle_plusredditpinterestlinkedinmailby feather