Tag Archives: Lockheed Aircraft Corporation

22 March 1948

Tony LeVier in the cockpit of Lockheed TP-80C-1-LO 48-356, the prototype T-33A Shooting Star two-place trainer.
Tony LeVier in the cockpit of Lockheed TP-80C-1-LO 48-356, the prototype T-33A Shooting Star two-place trainer. (Jet Pilot Overseas)

22 March 1948: Just over one year since being injured when the prototype P-80A was cut in half by a disintegrating turbojet engine, Lockheed test pilot Anthony W. (“Tony”) LeVier made the first flight of the prototype TP-80C-1-LO, serial number 48-356, a two-place jet trainer. The airplane was redesignated TF-80C Shooting Star on 11 June 1948 and to T-33A, 5 May 1949.

Adapted from a single-seat P-80C Shooting Star jet fighter, Lockheed engineers added 38.6 inches (0.980 meter) to the fuselage forward of the wing for a second cockpit, instrumentation and flight controls, and another 12 inches (0.305 meter) aft. A more powerful engine, an Allison J33-A-23 with 4,600 pounds of thrust, helped offset the increased weight of the modified airplane. Internal fuel capacity decreased 72 gallons (273 liters) to 353 (1,336 liters).

The Lockheed T-33A Shooting Star is 37.72 feet (11.50 meters) long, with a wingspan of 37.54 feet (11.44 meters), and overall height of 11.67 feet (3.56 meters). The wings a total area of 234.8 square feet (21.8 square meters). They have an angle of incidence of 1° with -1° 30′ of twist and 3° 49.8′ dihedral. The “T-Bird” has a basic weight of 9,637 pounds (4,371 kilograms), and gross weight of 15,280 pounds (6,931 kilograms).

Lockheed TP-80C-1-LO 48-356 prototype, with P-80C-1-LO Shooting Star 47-173, at Van Nuys Airport, California. (Lockheed Martin)

Originally produced with the J35-A-23 engine, the T-33 fleet was later standardized with the J35-A-35 engine. The J33 was a development of an earlier Frank Whittle-designed turbojet. It used a single-stage centrifugal-flow compressor, eleven combustion chambers and a single-stage axial-flow turbine section. The J33-A-35 had a Normal Power rating of 3,900 pounds of thrust (17.348 kilonewtons) at 11,250 r.p.m. (96%), and 4,600 pounds (20.462 kilonewtons) at 11,750 r.p.m. (100%). It was 107 inches (2.718 meters) long, 50.5 inches (1.283 meters) in diameter, and weighed 1,820 pounds (826 kilograms). The engine was 16 feet, 3.5 inches (4.966 meters) long, 3 feet, 1.0 inches (0.940 meters) in diameter and weighed 2,830 pounds (1,284 kilograms).

Cruise speed for maximum range is 0.68 Mach. The maximum speed is 505 knots (581 miles per hour/935 kilometers per hour), or 0.8 Mach, whichever is lower. Service ceiling 44,700 feet (1,3625 meters). The maximum range is 1,071 nautical miles (1,232 statute miles/1,983 kilometers).¹

While the P-80 fighter was armed with six .50-caliber machine guns in the nose, the trainer was usually unarmed. Two machine guns could be installed for gunnery training.

In production for 11 years, 5,691 T-33As were built by Lockheed, with licensed production of another 656 by Canadair Ltd., and 210 by Kawasaki Kokuki K.K. For over five decades, the “T-Bird” was used to train many tens of thousands of military pilots worldwide.

TF-80C 48-356 was rebuilt as the prototype for Lockheed’s YF-94A interceptor, and then modified further to the F-94B. Sources have reported it as being stored at Edwards Air Force Base, California.

Prototype Lockheed YF-94 48-356, first flight, 16 April 1949. (U.S. Air Force)
Prototype Lockheed YF-94 48-356, first flight, 16 April 1949. (U.S. Air Force)

¹ Specifications and performance data from T-33A PERFORMANCE EVALUATION, AFFTC-TR-61-22, May 1961,  Air Force Flight Test Center, Edwards Air Force Base, California. The Project Pilot was Captain Thomas P. Stafford, U.S. Air Force. Stafford was next selected for the NASA Gemini Program, and flew Gemini 6A and Gemini 9. He commanded Apollo 10.

© 2019, Bryan R. Swopes

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20 March 1945

Tony LeVier and the first prototype Lockheed XP-80A, 44-83021, in flight over southern California’s high desert, 1945. (Lockheed Martin)
Anthony W. (“Tony”) LeVier

20 March 1945: Tony LeVier was conducting a test flight of the first prototype Lockheed XP-80A, 44-83021, near Muroc Army Air Field (now known as Edwards Air Force Base).

The XP-80A was developed from the original XP-80 prototype, but was larger to incorporate a more powerful General Electric I-40 turbojet engine in place of the original Allis-Chalmers J36 (a license-built version of the British Halford H.1B).

The I-40 was a single-shaft turbojet which used a double-inlet, single-stage, centrifugal-flow compressor, fourteen straight-through combustors and a single-stage axial-flow turbine. The engine had a maximum speed of 11,500 r.p.m. and produced 4,000 pounds of thrust (17.79 kilonewtons). The I-40 was 48 inches (1.22 meters) in diameter and weighed 1,820 pounds (826 kilograms). The I-40 would be produced by Allison Division of General Motors as the J33 series.

General Electric I-40 turbojet engine cross section. (NASA)

At 15,000 feet (4,572 meters), LeVier put the XP-80A into a dive, intending to level off at 10,000 feet (3,048 meters) for a high-speed run. However, at 11,000 feet (3,353 meters), the single-stage turbine inside the jet engine failed and fragments tore through the prototype’s fuselage. The tail section of the airplane was cut off and the XP-80A went out of control.

An example of a turbine failure in a Lockheed P-80. (San Diego Air and Space Museum)

The XP-80A was not equipped with an ejection seat and LeVier had difficulty getting out, but finally escaped at about 4,000 feet (1,219 meters).

44-83021 crashed near the town of Rosamond and was completely destroyed. Tony LeVier’s parachute was swinging and he was severely injured when he hit the ground. His injuries kept him from flying for the next six months.

Lockheed XP-80A 44-83021 (U.S. Air Force)
Lockheed XP-80A 44-83021 (U.S. Air Force)

The Lockheed XP-80A was a single-place, single engine prototype fighter. It was 34 feet, 6 inches (10.516 meters) long with a wingspan of 39 feet, 0 inches (11.887 meters) and overall height of 11 feet, 4 inches (3.454 meters). It had an empty weight of 7,225 pounds (3,277 kilograms) and gross weight of 9,600 pounds (4,354 kilograms).

Armament consisted of six Browning .50-caliber AN-M2 machine guns with 300 rounds of ammunition per gun.

Two XP-80As were built. These were followed by twelve YP-80A Shooting Star service test aircraft. The Lockheed P-80A Shooting Star was ordered into production with an initial contract for 500 aircraft. This was soon followed by a second order for 2,500 fighters.

Wreckage of XP-80A 44-83021 loaded on a flat bed trailer. (U.S. Air Force)
Wreckage of XP-80A 44-83021 loaded on a flat bed trailer. (U.S. Air Force)

© 2019, Bryan R. Swopes

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17 March 1937

Another camera angle shows Amelia Earhart taking off from Oakland Municipal Airport, 17 March 1937. (© Bettman/CORBIS)
This photograph shows Amelia Earhart taking off from Oakland Municipal Airport,  4:37 p.m., 17 March 1937. (© Bettman/CORBIS)

17 March 1937, 4:37 p.m. Pacific Standard Time (23:37, UTC): Amelia Mary Earhart departed Oakland Municipal Airport, located on the eastern shore of San Francisco Bay, beginning the first leg of her around-the-world flight. Also aboard were her friend and adviser, Albert Paul Mantz, navigator Frederick J. Noonan and radio operator/navigator Harry Manning. The airplane was Earhart’s Lockheed Electra 10E Special, NR16020.

Great Circle course from Oakland, California, to Honolulu, Hawaii. (Great Circle Mapper)

Flying a Great Circle course, the distance from Oakland to Wheeler Field on the Island of Oahu, Territory of Hawaii, was 2,093 nautical miles (2,408 statute miles/3,876 kilometers).

Amelia Earhart and her crew pose in front of the Electra. Left to right, Paul Mantz, co-pilot; Amelia Earhart, pilot; Captain Harry V. Manning, radio operator/navigator; and Captain Frederick J. Noonan, also a navigator, at Oakland Municipal Airport, California, 17 March 1937.
Amelia Earhart and her crew pose in front of the Electra. Left to right, Paul Mantz, co-pilot; Amelia Earhart, pilot; Captain Harry Manning, radio operator/navigator; and Captain Frederick J. Noonan, also a navigator, at Oakland Municipal Airport, California, 17 March 1937.

Captain Frederick J. Noonan was formerly the Chief Navigator of Pan American Airways, and had extensive experience in transoceanic flight. Captain Harry Manning was a Master Mariner, commanding ocean liners for United States Lines. (He would later serve as captain of SS United States, the flagship of America’s Merchant Marine, and as the Commodore of United States Lines.)

Checking weight and balance and fuel quantity calibration at Lockheed, Burbank, California. (Purdue)
Checking weight and balance and fuel quantity calibration at Lockheed, Burbank, California. (Purdue University Library)

Amelia Earhart’s 1936 Electra 10E Special, serial number 1055, was the fifth of fifteen built by the Lockheed Aircraft Corporation at Union Air Terminal, Burbank, California (now, Hollywood Burbank Airport, BUR). Designed to carry as many as ten passengers, NR16020 had been modified to carry fuel for 20 hours of flight. Amelia first flew the Electra with a Lockheed test pilot, Elmer C. McLeod, 21 July 1936, and took delivery on her 39th birthday, 24 July. The airplane cost $80,000.

Kelly Johnson with a wind tunnel model of a version of the Lockheed Electra. Based on testing, numerous changes were made before the airplane was placed in production.
Kelly Johnson with a wind tunnel model of a version of the Lockheed Electra. Based on testing, numerous changes were made before the airplane was placed in production. (Lockheed)

The Lockheed Electra 10 was designed by Hall Hibbard, and was Clarence L. “Kelly” Johnson’s first assignment when he went to work at Lockheed. It was 38 feet, 7 inches (11.760 meters) long with a wingspan of 55 feet, 0 inches (16.764 meters) and overall height of 10 feet, 1 inch (3.073 meters).

While the basic Model 10 had an empty weight of 6,454 pounds (2,927.5 kilograms), Amelia Earhart’s modified Electra 10E Special had an empty weight of 7,265 pounds (3,295.4 kilograms), partly as a result of the additional fuel tanks which had been installed. Fully fueled, NR16020 carried 1,151 gallons (4,357 liters) of gasoline.

NR19020 was powered by two air-cooled, supercharged, 1,343.804-cubic-inch-displacement (22.021 liter) Pratt & Whitney Wasp S3H1 single-row nine-cylinder radial engines with a compression ratio of 6:1. These engines used a single-stage supercharger. The S3H1 had a Normal Power rating of 550 horsepower at 2,200 r.p.m. to 5,000 feet (1,524 meters), and 600 horsepower at 2,250 r.p.m for Takeoff, using 80/87 aviation gasoline. The direct-drive engines turned two-bladed Hamilton Standard variable-pitch, constant-speed propellers with a diameter of 9 feet, 7/8-inch (2.675 meters). The Wasp S3H1 was 3 feet, 7.01 inches (1.092 meters) long, 4 feet, 3.60 inches (1.311 meters) in diameter, and weighed 865 pounds (392 kilograms).

Amelia Earhart's Lockheed Electra 10-E, taking off from Oakland Airport, 1637 hours, 17 March 1937. The tail wheel has just lifted off the runway.
Amelia Earhart’s Lockheed Electra 10E, NR16020, taking off from Oakland Airport, 1637 hours, 17 March 1937. The tail wheel has just lifted off the runway.
Amelia Earhart's Lockheed Electra 10E, NR16020, departs Oakland, 4:37 p.m., 17 March 1937. (Purdue University Library)
Amelia Earhart’s Lockheed Electra 10E, NR16020, departs Oakland, 4:37 p.m., 17 March 1937. The landing gear is retracting. (Purdue University Library)
Amelia Earhart’s Lockheed Electra 10E, NR16020, over San Francisco Bay. (Photographed by Clyde Herwood Sunderland, Jr.)
Amelia Earhart’s Lockheed Electra 10E Special, NR16020, passing the San Francisco-Aakland Bay Bridge. (Detail from photograph by Clyde Herwood Sunderland, Jr.)

© 2019, Bryan R. Swopes

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15 March 1962

Color photograph of Flying Tiger Line’s Lockheed L-1049H Super Constellation N6921C. (Pinterest)

15 March 1962: Flying Tiger Line Flight 7815/13 was a chartered flight for the Military Air Transport Service (M.A.T.S. Flight 739/14), from Travis Air Force Base,Fairfield, California, to Saigon, Republic of Vietnam, with scheduled refueling stops at Honolulu, Hawaii; Wake Island; Naval Air Station Agana, Guam; and Clark Air Force Base, Luzon, Philippine Islands. The flight departed Travis at 0545 G.M.T., 14 March.

The airliner was a Lockheed L-1049H Super Constellation, N6921C, under the command of Captain Gregory P. Thomas. The flight crew consisted of three pilots, two flight engineers, and two navigators/radio operators. There were four stewardesses in the passenger cabin, with 96 passengers. Three of the passengers were Vietnamese military personnel, while the remainder were U.S. Army electronics and communications specialists.

The Super Constellation departed Guam for Luzon at 1257 G.M.T, 15 March. It climbed to 18,000 feet (5,486 meters). The estimated flight time for this leg was 6 hours, 19 minutes. The airplane carried sufficient fuel for 9 hours, 30 minutes of flight.

At 1422 G.M.T., M.A.T.S.. flight 739/14 radioed the Guam International Flight Service Station, reporting their position at 1416 hours as North 13° 40′, East 140°, and cruising at 18,000 feet (5,486 meters). The navigator gave the flight’s estimated position at 1530 G.M.T. as N. 14° 00′, E. 135° 00′.

There was no 1530 hours position report from Flight 739. Beginning at 1533 G.M.T., the Guam I.F.S.S. began attempting to contact the airliner, but was unsuccessful. At 1943  hours, the Joint Rescue Coordination Centers at NAS Agana and Clark AFB began search and rescue operations. At 2227 hours, the airliner was declared lost.

S.S. T. L. Lenzen, built by Mitsubishi Zozen K.K., 1959–1960. 42,277 deadweight tons, 16,000 horsepower. Cargo capacity 319,000 barrels. (The Allen Collection)

The crew of the Standard Oil Company tanker S.S. T. L. Lenzen reported that at 1530 G.M.T., (1:30 a.m., local time), five persons on board had witnessed a midair explosion near Flight 739’s estimated position for that time. The flash was bright enough to illuminate the ship’s decks.

“It was established, upon interrogation of five of the crew members, that shipboard lookouts had observed a midair explosion at the approximate position and time when N 6921C was expected to reach 14°00′ North and 135°00′ East. It was recalled that a vapor trail, or some phenomenon resembling a vapor trail, was first observed overhead and slightly to the north of the tanker and moving in an east to west direction. The Lenzen was cruising on a heading of 077° at this time. As this vapor trail passed behind a cloud, there occurred an explosion which was described by the witnesses as intensely luminous, with a white nucleus surrounded by a reddish-orange periphery with radial lines of identically colored light. The explosion occurred in two pulses lasting between two and three seconds and from it two flaming objects of unequal brightness and size apparently fell, at different speeds, into the sea. During the last 10 seconds of the fall of the slower of the two objects, a small bright target was observed on the ship’s radar bearing 270°, range 17 miles.

“The captain of the Lenzen stated that he arrived on deck in time to observe the fall of the slower object for approximately 10 seconds before it disappeared from view. He estimated its position in reference to a star and ordered the ship’s course reversed and, after aligning the heading of the vessel with the star, found his heading to be 270°—the same as the bearing of the target previously seen on radar. The captain reported that the weather at that time was:  ‘moonlight, clear atmosphere, 1/4 covered sky by small cumulus clouds evenly distributed.’ The ship proceeded to the position of the radar target and searched the area until 2105 at which time the original course was resumed. No signals or unusual sightings were reported.

“The subsequent search, one of the most extensive ever conducted in the history of aviation, covered 144,000 square miles and utilized 1,300 people, 48 aircraft, and 8 surface vessels. A total of 377 air sorties were flown which involved over 3,417 flying hours. Despite the thoroughness of the search, nothing was found that could conceivably be linked to the missing aircraft or its occupants.”

CIVIL AERONAUTICS BOARD, AIRCRAFT ACCIDENT REPORT, File No. 1-0002, 8 April 1963, at Pages 8–9

Probable Cause: The Board is unable to determine the probable cause of this accident from the evidence now available.

The last known position of Flying Tiger Line M.A.T.S. Flight 739/14. (GIS & Environmental Management Technologies, LLC)

BURBANK, Calif. (AP)—Sabotage, already suspected in the mysterious disappearance of an airliner loaded with American troops, would be considered a stronger possibility than ever if it turns out the plane blew up.

A Flying Tiger Lines official said Sunday experts consider it impossible for a violent explosion to occur about aboard its Super Constellation under normal conditions.

“We’ve gone over it thoroughly the last few days,” said Frank B. Lynott, executive vice president for operation. “The only explosions known to happen would be in empty wing tanks, and none of these would have been empty then. So far as blowing completely apart,” he said, “there’s nothing that powerful aboard: fuel tanks don’t just go off like that.”

Hartford Courant, Hartford, Connecticut, Volume CXXV, Number 78, Monday, 19 March 1962, Page 21 at Column 2

Another speculative theory was that the airliner had been hijacked in order to kidnap the passengers.

Lockheed L-1049H Super Constellation N6921C. (Bureau of Aircraft Accident Archives)
Capt. Gregory P. Thomas (Los Angeles Times)

The flight crew of M.A.T.S. Flight 739/14 were all highly experienced airmen. Captain Gregory P. Thomas had been employed by the Flying Tiger Line since 7 July 1950. He held an Airline Transport Pilot certificate, and was type-rated in the Curtiss C-46, Douglas DC-3, DC-4, DC-6, and Lockheed L-1049H. He had flown a total of 19,500 flight hours, with 3,562 hours in the L-1049H. He was 48 years old and lived in Red Bank, New Jersey. According to contemporary news reports, Captain Thomas was “a colorful and heroic flier.” (In 1957, he had ditched a Douglas DC-6 in Jamaica Bay with no loss of life.)

First Officer Robert J. Wish. (Flying Tiger Line)

First Officer Robert J. Wish had worked for FTL since 25 January 1951. He held an ATP certificate, with type ratings for C-46, DC-4 and L-1049H.had a total of 17,500 flight hours, with 3,374 hours in the L-1049H. Wish was also 48 years old, and lived in Hidden Hills, California. Second Officer Robbie J. Gayzaway [Gazaway or Gazzaway?], 39 years old, from Fillmore, California, was employed by FTL 7 January 1953. He held an ATP certificate with an L-1049H type rating. He had flown 5,500 hours, with 900 in the L-1049H.

Flight Engineer George Mitchell Nau was hired by the Flying Tiger Line 15 December 1956. He held an F.A.A. Flight Engineer certificate. He had flown 1,235 hours in the L-1049H. Nau was 38 years old and lived in Pacoima, California. A second flight engineer was Clayton E. McClellan, 33 years old, from San Mateo, California. He was also a certified flight engineer. He had worked for FTL since 4 April 1960. He had approximately 1,090 hours in the L-1049H.

Navigator Grady R. Burt, Jr. (Connie Burt Spolar via Find A Grave)

Navigator William T. Kennedy was hired by FTL 13 February 1962. He was 45 years old, from Braintree, California. He held both navigator and radio operator licenses. Navigator Grady Reese Burt, Jr., was hired 14 February 1962. He also held both navigator and radio operators licenses. He lived in Baldwin Park, California.

The cabin crew were Senior Flight Attendant Barbara Jean Walmsley from Santa Barbara, California; Hildegard Muller; Christel Diana Reiter of San Mateo; and Patricia Wassum.

The Super Constellation remains missing today, and all 107 persons on board are presumed to have died. With respect to the loss of life, this was the worst accident involving a Lockheed Constellation.

N6921C was the second Lockheed L-1049H Super Constellation lost by Flying Tiger Line on 15 March 1962.

The first was N6911C (Lockheed serial number 4804), under the command of Captain Morgan W. Hughes of San Mateo, California. It was also a M.A.T.S. chartered flight, FTL Flight 7816/14, and, like N6921C, had departed from Travis Air Force Base on the night of 14 March. It was reportedly carrying a “secret military cargo” to Kadena Air Force Base, Okinawa.

While on a Ground Controlled Approach (GCA) approach to NAS Adak Island (in the Aleutian Islands of Alaska) the airliner was consistently below the glide path. Despite seven separate warnings from the ground controller, at 1214 G.M.T., the airplane’s landing gear struck rocks 328 feet (100 meters) short of the runway threshold. It then slid for 2,000 feet (610 meters) along the runway, coming to rest just off its edge. The airliner caught fire and was destroyed. Of the 7 persons on board, 1, James M. Johnstone, a flight engineer, was killed.

Captain Hughes had a total of 13,000 flight hours, with 3,055 hours in the L-1049H. The co-pilot, First Officer Thomas M. Mitchell, had 19,000 flight hours with 1,211 hours in type.

The Civil Aeronautics Board determined that the Probable Cause of this accident was “. . . attributed to the pilots’ misjudgement of distance and altitude during the final approach.”

Flying Tiger Line lost two more L-1049H Super Constellations, N6923C and 6913C, in 1962.

Flying Tiger Line’s Lockheed L-1049H Super Constellation N6918C, the same type aircraft as N6921C. (Jon Proctor via Wikipedia)

Lockheed L-1049H Super Constellation N6921C (LAC serial number 4817) was delivered to the Flying Tiger Line in 1957. It was a large, four-engine, long-range airliner. The airplane was operated by two pilots, a flight engineer and a navigator.

The L-1049 series was 18 feet, 4 inches (5.588 meters) longer than the preceding L-749 Constellation, and could be converted from a passenger airliner to an air freighter configuration in a few hours. The L-1049 was 113 feet, 3.7 inches (34.536 meters) long, with a wingspan of 123 feet, 0 inches (37.490 meters), and overall height of 24 feet, 9.5 inches (7.557 meters). The fuselage had a maximum diameter of 11 feet, 7½ inches ( meters).

The total wing area was 1,650 square feet (153.3 square meters).The wings’ leading edges were swept aft 7° 28.7′, while the trailing edges swept forward 3° 13′. They had 7° 36.6′ dihedral.

The L-1049H had an empty weight of approximately 73,000 pounds (33,122 kilograms. N6921C had an maximum allowable gross weight of 141,845 pounds (64,340 kilograms). When it departed Guam, it carried 25,552 pounds (11,590 kilograms) of 115/145-octane aviation gasoline, and its gross weight was 132,554 pounds (60,125 kilograms).

Lockheed L-1049 Super Constellation three-view illustration with dimensions. (Lockheed Aircraft Corporation)

N6921C was powered by four air-cooled, direct-fuel-injected, 3,347.662 cubic-inch-displacement (54.858 liters) Wright Aeronautical Division 988TC18EA3 turbocompound engines with a compression ratio of 6.70:1. The turbocompound engine used captured exhaust gases to drive three Power Recovery Turbines. These PRTs were geared to the engine’s crankshaft. This system added approximately 450 horsepower to the engine’s total power output.

The 988RC18EA3 had Normal Power ratings of 2,860 horsepower at 2,650 r.p.m. at Sea Level; 2,920 horsepower at 2,650 r.p.m. at 4,800 feet (1,463 meters); 2,450 horsepower at 2,600 r.p.m. at 16,400 feet (4,999 meters). Its Maximum Power ratings were 3,400 horsepower at 2,900 r.p.m. to 4,000 feet (1,219 meters) for Take Off; and 2,600 horsepower at 2,600 r.p.m. at 15,200 feet (4,633 meters). 115/145-octane aviation gasoline was required.

The engines turned three-bladed Hamilton Standard or Curtiss Electric propellers through a 0.4375:1 propeller gear reduction. The reduction gears were strengthened to support 4,000 horsepower. The Wright 988TC18EA3 was 7 feet, 5.53 inches (2.274 meters) long, 4 feet, 8.59 inches (1.473 meters) in diameter, and weighed 3,640 pounds, ± 1% (1,651 kilograms).

Factory cutaway Wright Aeronautical Division 988TC18 turbocompound engine. (Aircraft Engine Historical Society)

The L-1049 had a maximum speed for normal operations (VNO) of 260 knots (299 miles per hour/482 kilometers per hour) and a maximum speed (VNE) of 293 knots (337 miles per hour/543 kilometers per hour) up to 11,000 feet (3,353 meters). VNO was reduced by 9 knots, and VNE reduced by 11 knots, for each 2,000 foot (610 meters) increase in altitude above 11,000 feet.

The maximum operating altitude for the L-1049 was 25,000 feet (7,620 meters). Its maximum range was 4,140 miles (6,663 kilometers).

N6921C had flown a total 17,224 hours in just under five years. It was properly certified and maintained, and had no known discrepancies. N6911C had 16,038 hours, TTAF.

Flying Tiger Line’s Lockheed L-1049H Super Constellation N6915C, the same aircraft type as N6911C and 6921C. This airplane crashed 24 December 1964 at San Francisco, California.

© 2019, Bryan R. Swopes

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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

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