Tag Archives: Interceptor

8 June 1966

XB-70A-2-NA Valkyrie 62-0207 leading a formation of aircraft powered by General Electric engines. Joe Walker’s F-104 is just below the B-70’s right wing tip. (U.S. Air Force)

8 June 1966: During a publicity photo formation flight, a Lockheed F-104N Starfighter, N813NA, flown by NASA Chief Research Test Pilot Joseph A. Walker, was caught in the wingtip vortices of the North American Aviation XB-70A-2 Valkyrie, 62-0207, the second prototype Mach 3+ strategic bomber. The Starfighter rolled up and across the Valkyrie. The two airplanes collided, with the F-104 taking off the Valkyrie’s vertical fins, then exploding.

Lockheed F-104N N813NA collided with North American Aviation XB-70A-2 Valkyrie 62-0207 and exploded, 8 June 1966. (U.S. Air Force)

The Valkyrie continued to fly straight and level for 16 seconds before it began to roll inverted. The B-70’s pilot, Alvin S. White, was able to eject, though he was severely injured. Joe Walker and B-70 co-pilot Major Carl S. Cross, United States Air Force, were killed.

The B-70 is out of control and going down in this photograph. Fuel is spraying out of damaged tanks. (U.S. Air Force)
The B-70 is out of control and going down in this photograph. A large section of the left wing is missing. JP-8 fuel is spraying out of damaged tanks. (U.S. Air Force)

Still photographs and motion picture film of the formation were being taken from Clay Lacy’s Gates Lear Jet. The photos were for a General Electric publicity campaign showing U.S. military aircraft that were powered by GE engines. Air Force procedures for requesting and approval of publicity flights were not properly followed and it is likely this flight would not have been approved had they been.

XB-70A-2 Valkyrie has rolled inverted and pitched nose down. (U.S. Air Force)
The XB-70A-2 Valkyrie has rolled inverted and pitched nose down. The outer section of the left wing is missing. The trailing edge and tip tank of the Lear Jet photo plane’s right wing are in the foreground. (U.S. Air Force)

Reportedly, just prior to the collision, Walker radioed, “I’m opposing this mission. It is too turbulent and it has no scientific value.”

The wreckage of the North American Aviation XB-70A-2 Valkyrie 62-0207 burnds on the desert floor, north of Barstow, california, 8 June 1968. (U.S. Air Force)
The wreckage of the North American Aviation XB-70A-2 Valkyrie 62-0207 burns on the desert floor at N. 35°03’47”, W. 117°01’27”, north of Barstow, California, 8 June 1966. (U.S. Air Force)

© 2016, Bryan R. Swopes

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25 May 1953

George S. Welch with North American YF-100A 52-5754. (North American Aviation, Inc.)

25 May 1953: North American Aviation Chief Test Pilot George S. Welch took the YF-100A Super Sabre, U.S. Air Force serial number 52-5754, for its first flight at Edwards Air Force Base. The airplane reached Mach 1.03.

Development of the Super Sabre began with an effort to increase the speed of the F-86D and F-86E Sabre fighters. The wings had more sweep and the airfoil sections were thinner. A much more powerful engine would be needed to achieve supersonic speed in level flight. As design work on the “Sabre 45” proceeded, the airplane evolved to a completely new design. Initially designated XF-100, continued refinements resulted in the first two aircraft being redesignated YF-100A.

North American Aviation Chief Test Pilot George S. Welch in the cockpit of the YF-100A, 52-5754, at Los Angeles International Airport. (North American Aviation, Inc.)
North American Aviation Chief Test Pilot George S. Welch in the cockpit of YF-100A 52-5754 at Los Angeles International Airport. (North American Aviation, Inc.)

The two YF-100As, 52-5754 and 52-5755, were 47 feet, 11¼ inches (14.611 meters) long with a wingspan of 36 feet, 7 inches (11.151 meters) and height of 16 feet, 3 inches (4.953 meters). The wings were swept to 45° at 25% chord, and had 0° angle of incidence and 0° dihedral. The ailerons were placed inboard on the wings to eliminate their twisting effects at high speed. The airplane had no flaps. The pre-production prototypes weighed 18,135 pounds (8,226 kilograms) empty, and had a gross weight of 24,789 pounds (11,244 kilograms).

The new air superiority fighter was powered by a Pratt & Whitney Turbo Wasp J57-P-7 engine. The J57 was a two-spool axial-flow turbojet which had a 16-stage compressor section (9 low- and 7 high-pressure stages) and a 3-stage turbine (2 high- and 1 low-pressure stages). The J57-P-7 had a Maximum Continuous Power rating of 8,000 pounds of thrust (35.586 kilonewtons) at 5,875 r.p.m., N1, and 9550 r.p.m., N2. The engine’s Military Power rating was 9,700 pounds thrust (43.148 kilonewtons) at 6,275 r.p.m./9,900 r.p.m., for 30 minutes; and 14,800 pounds thrust (65.834 kilonewtons) at 6,275 r.p.m./9,900 r.p.m. with afterburner, limited to five minutes. The engine was 20 feet, 9.7 inches (6.342 meters) long, 3 feet, 3.9 inches (1.014 meters) in diameter, and weighed 5,075 pounds (2,303 kilograms). Later production aircraft used a J57-P-39 engine, which had the same ratings.

Cutaway illustration ofa North American Aviation F-100A Super Sabre. (Boeing)
Cutaway illustration of a North American Aviation F-100A Super Sabre. (Boeing)
North American Aviation YF-100 Super Sabre 52-5754. (U.S. Air Force)
North American Aviation YF-100 Super Sabre 52-5754, 19 May 1953. (North American Aviation, Inc.)
The prototype North American Aviation YF-100A Super Sabre, 52-5754, with the North American F-100 team. Chief Test Pilot George S. Welch is in the center of the front row, seated. (North American Aviation, Inc.)

The YF-100A had a maximum speed of 660 miles per hour (1,062 kilometers per hour) at 43,350 feet (13,213 meters). The service ceiling was 52,600 feet (16,033 meters). Range with internal fuel was 422 miles (679 kilometers).

During testing, 52-5754 reached Mach 1.44 in a dive. On 29 October 1953, Colonel Frank K. Everest set a world speed record of 1,215.298 kilometers per hour (755.151 miles per hour) with 754.¹

In service with the United States Air Force, the Super Sabre’s mission changed from air superiority fighter to fighter bomber. It was used extensively during the Vietnam War. North American Aviation, Inc., built 2,294 single and tandem-seat Super Sabres between 1954 and 1959.

North American Aviation YF-100A Super Sabre 52-5754. (U.S. Air Force)
North American Aviation YF-100A Super Sabre 52-5754 over Edwards Air Force Base, California, 25 May 1953. (North American Aviation, Inc.)
North American Aviation YF-100A Super Sabre 52-5754 lands on the dry lake at Edwards Air Force Base, California. (North American Aviation, Inc.)

George Welch was born George Lewis Schwartz, in Wilmington, Delaware, 10 May 1918. His parents changed his surname to Welch, his mother’s maiden name, so that he would not be effected by the anti-German prejudice that was widespread in America following World War I. He studied mechanical engineering at Purdue, and enlisted in the Army Air Corps in 1939.

North American Aviation YF-100A Super Sabre 52-5754 banks away from a chase plane during a flight test. (U.S. Air Force)

George S. Welch is best remembered as one of the heroes of Pearl Harbor. He was one of only two fighter pilots to get airborne during the Japanese surprise attack on Hawaii, 7 December 1941. Flying a Curtiss P-40B Warhawk, he shot down three Aichi D3A “Val” dive bombers and one Mitsubishi A6M2 Zero fighter. For this action, Lieutenant General H.H. “Hap” Arnold recommended the Medal of Honor, but because Lieutenant Welch had taken off without orders, an officer in his chain of command refused to endorse the nomination. He received the Distinguished Service Cross. During the War, Welch flew the Bell P-39 Airacobra and Lockheed P-38 Lightning on 348 combat missions. He had 16 confirmed aerial victories over Japanese airplanes and rose to the rank of Major.

Suffering from malaria, George Welch was out of combat, and when North American Aviation approached him to test the new P-51H Mustang, General Arnold authorized his resignation. Welch test flew the P-51, FJ-1 Fury, F-86 Sabre and F-100 Super Sabre. He was killed 12 October 1954 when his F-100A Super Sabre came apart in a 7 G pull up from a Mach 1.5 dive.

North American Aviation pre-production prototype YF-100A Super Sabre 52-5754 with drag chute deployed on landing at Edwards Air Force Base, California. (U.S. Air Force)
North American Aviation pre-production prototype YF-100A Super Sabre 52-5754 with drag chute deployed on landing at Edwards Air Force Base, California. The extended pitot boom is used to calibrate instruments early in the flight test program. (U.S. Air Force)
North American Aviation YF-100 Super Sabre 52-5754 with external fuel tanks, parked on the dry lake at Edwards Air Force Base, California. (U.S. Air Force)

¹ FAI Record File Number 8868

© 2018, Bryan R. Swopes

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17 April 1956

The first Lockheed F-104A Starfighter, 55-2956, i stowed out of its hangar at Air Force Plant 42, Palmdale, California, 17 April 1956. (Lockheed)
The first Lockheed F-104A Starfighter, 55-2956, is towed out of its hangar at Air Force Plant 42, Palmdale, California, 17 April 1956. (Lockheed Martin)

17 April 1956: Lockheed Aircraft Corporation rolled out the very first production F-104A Starfighter, 55-2956, at Air Force Plant 42, Palmdale, California. This airplane, one of the original seventeen pre-production YF-104As, incorporated many improvements over the XF-104 prototype, the most visible being a longer fuselage.

Once the configuration was finalized, 55-2956 was the first YF-104A converted to the F-104A production standard. In this photograph, the F-104’s secret engine intakes are covered by false fairings.

Lockheed F-104A Starfighter 55-2956 rollout at Palmdale, 17 April 1956. (Lockheed)
Lockheed F-104A Starfighter 55-2956 rollout at Palmdale, 17 April 1956. (Lockheed Martin)

The Lockheed F-104A Starfighter was a single-place, single-engine supersonic interceptor. It was designed by a team lead by the legendary Clarence L. “Kelly” Johnson. The F-104A was 54 feet, 8 inches (16.662 meters) long with a wingspan of 21 feet, 9 inches (6.629 meters) and overall height of 13 feet, 5 inches (4.089 meters). It had an empty weight of 13,184 pounds (5,980.2 kilograms), combat weight of 17,988 pounds (8,159.2 kilograms), gross weight of 22,614 pounds (10,257.5 kilograms) and a maximum takeoff weight of 25,840 pounds (11,720.8 kilograms). Internal fuel capacity was 897 gallons (3,395.5 liters).

The F-104A was powered by a single General Electric J79-GE-3A engine, a single-spool axial-flow afterburning turbojet, which used a 17-stage compressor and 3-stage turbine. The J79-GE-3A is rated at 9,600 pounds of thrust (42.70 kilonewtons), and 15,000 pounds (66.72 kilonewtons) with afterburner. The engine is 17 feet, 3.5 inches (5.271 meters) long, 3 feet, 2.3 inches (0.973 meters) in diameter, and weighs 3,325 pounds (1,508 kilograms).

The F-104A had a maximum speed of 1,037 miles per hour (1,669 kilometers per hour) at 50,000 feet (15,240 meters). Its stall speed was 198 miles per hour (319 kilometers per hour). The Starfighter’s initial rate of climb was 60,395 feet per minute (306.8 meters per second) and its service ceiling was 64,795 feet (19,750 meters).

Lockheed F-104A-5-LO Starfighter 56-737 launches two AIM-9B Sidewinder infrared-homing air-to-air missiles. (U.S. Air Force)

Armament was one General Electric M61 Vulcan six-barreled revolving cannon with 725 rounds of 20 mm ammunition. An AIM-9B Sidewinder heat-seeking air-to-air missile could be carried on each wing tip, or a jettisonable fuel tank with a capacity of 141.5 gallons (535.6 liters).

Lockheed built 153 of the F-104A Starfighter initial production version. A total of 2,578 F-104s of all variants were produced by Lockheed and its licensees, Canadair, Fiat, Fokker, MBB, Messerschmitt,  Mitsubishi and SABCA. By 1969, the F-104A had been retired from service. The last Starfighter, an Aeritalia-built F-104S ASA/M of the  Aeronautica Militare Italiana, was retired in October 2004.

Lockheed JF-104A Starfighter 55-2956 at NOTS China Lake. (U.S. Navy)

This Starfighter, 55-2956, was converted to a JF-104A with specialized instrumentation. It was transferred to the U.S. Navy to test AIM-9 Sidewinder missiles at Naval Ordnance Test Station (NOTS) China Lake, approximately 55 miles (88 kilometers) north-northeast of Edwards Air Force Base in the high desert of Southern California. 55-2956 was damaged beyond repair when it lost power on takeoff and ran off the runway at Armitage Field, 15 June 1959.

While on loan to teh U.S. Navy for testing the Sidewinder missile, Lockheed F-104A Starfighter 55-2956 crashed on takeoff at NAS China Lake. Damaged beyond economic repair, the Starfighter was written off. (U.S. Navy)
While on loan to the U.S. Navy for testing the AIM-9 Sidewinder missile, Lockheed JF-104A Starfighter 55-2956, with Commander Herk Camp in the cockpit, crashed on takeoff at Armitage Field, NOTS China Lake. (U.S. Navy)

©2018, Bryan R. Swopes

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5 March 1936

The Vickers-Supermarine Type 300, K5054, during its first flight, 5 March 1936. The pilot is Captain Joseph Summers. (Supermarine Aviation Works)

5 March 1936: At 4:35 p.m., Thursday afternoon, Vickers Aviation Ltd.’s Chief Test Pilot, Captain Joseph (“Mutt”) Summers, took off on the first flight of the Vickers-Supermarine Type 300, K5054, prototype of the legendary Supermarine Spitfire, at Eastleigh Aerodrome, Southampton, England. Landing after only 8 minutes, Summers is supposed to have said, “Don’t change a thing!”

Supermarine Type 300 K5054. © IWM (ATP 8770C)
Supermarine Type 300 K5054. © IWM (MH 5215)
Supermarine Type 300 K5054. © IWM (MH 5212)
Supermarine Type 300 K5054. © IWM (ATP 8770G)

The Vickers-Supermarine Type 300 was a private venture, built to meet an Air Ministry requirement¹ for a new single-place, single-engine interceptor for the Royal Air Force. The airplane was designed by a team led by Reginald Joseph Mitchell, C.B.E., F.R.Ae.S., and was built at the Supermarine Aviation Works, Southampton, Hampshire, England.

Vickers-Supermarine Type 300, K5054. (Supermarine Aviation Works)

R.J. Mitchell was famous for his line of Schneider Trophy-winning and world record-setting Supermarine racers of the late 1920s and early 1930s, the Supermarine S.4, S.5, S.6 and S.6B.² Mitchell was appointed Commander of the Most Excellent Order of the British Empire  (Civil Division) (CBE) in His Majesty’s New Year’s Honours, 2 January 1932, for “services in connection with the Schneider Trophy Contest.”

Reginald Joseph Mitchell, C.B.E., F.R.Ae.S.

The Vickers-Supermarine Type 300 was 29 feet, 11 inches (9.119 meters) long, with a wingspan of 36 feet, 10 inches (11.227 meters) and overall height of 12 feet, 8 inches (3.861 meters). The wings had a distinctively ellipsoid shape, area was 242.0 square feet (22.48 square meters). Its empty weight was 4,082 pounds (1,151.6 kilograms) and loaded weight was 5,359 pounds (2,430.8 kilograms).

Supermarine Type 300 K5054. © IWM (MH 5205)

K5054 was powered by a right-hand tractor, liquid-cooled, supercharged, 1,648.9-cubic-inch-displacement (27.04-liter) Rolls-Royce Merlin C (“ramp head”) single overhead camshaft (SOHC) 60° V-12 engine, serial number C9 (Air Ministry serial number A111,139), which had a Normal Power rating of 1,029 horsepower at 2,600 r.p.m. at an altitude of 11,000 feet (3,353 meters), with +6 pounds per square inch boost (0.41 Bar). The engine turned aan Airscrew Co., Ltd., Watts-type two-bladed, fixed-pitch, compressed wood propeller through a gear reduction drive (possibly 0.420:1). (K5083, the prototype Hawker Hurricane, was also equipped with a Merlin C.) An improved 1,035 horsepower Merlin F engine, serial number F21 (Air Ministry serial number A115,73 ), was later installed.

Interestingly, Rolls-Royce discovered that using exhaust stacks to direct the flow of gases rearward provided an additional 70 pounds of thrust, an increase of 7% over that provided by the propeller alone. Later testing of K5054 with “fish tail” exhaust stacks increased its top speed to about 360 miles per hour (579 kilometers per hour).

Supermarine Type 300 K5054. © IWM (MH 5213)
Supermarine Type 300 K5054. © IWM (ATP 8321D)
The prototype Vickers-Supermarine Type 300, K5054, in light blue lacquer paint. (RAF Museum)

The Type 300 had a cruise speed of 311 miles per hour ( kilometers per hour) at 15,000 feet (4,572 meters), and could reach that altitude in 5 minutes, 52 seconds. maximum speed of 349 miles per hour (562 kilometers per hour) at 16,800 feet (5,121 meters). The prototype had a service ceiling of 35,400 feet (10,790 meters).

A report summarizing the flight testing of K5054 stated, “The aeroplane is simple and easy to fly and has no vices.” Visibility was good, the cockpit was comfortable, and it was a stable gun platform.

 K5054 after crash landing at Matrlesham Heath, 22 March 1937. (Solent Sky Museum)
K5054 after forced landing at Martlesham Heath, 22 March 1937. Note the “fish tail” exhaust stacks. (Solent Sky Museum)

On 22 March 1937, K5054’s engine lost oil pressure and the pilot made a belly landing on Marlesham Heath. The Spitfire was damaged, but was repaired and returned to service.

The prototype Spitfire stalled on landing at RAE Farnborough, 4 September 1939. After several bounces on the runway, it nosed over. The pilot, Flight Lieutenant Gilbert Stanbridge (“Spinner”) White, was severely injured. He died 9 September.

K5054 was disassembled and scrapped.

The Air Ministry ordered the Spitfire Mk.I into production before K5054’s first flight, with an initial order for 310 airplanes. The first production fighter was delivered to the Royal Air Force 4 August 1938. Between 1938 and 1948, 20,351 Spitfires were built in 24 variants.

Supermarine Spitfire of the Royal Air Force Battle of Britain Memorial Flight. (Royal Air Force)
Captain Joseph Summers

Captain Joseph Summers, C.B.E., was born 10 March 1904. He was the older brother of Group Captain Maurice Summers, who was also a test pilot for Vickers. In 1922, he married Miss Dulcie Jeanette Belcher at Sculcoates, Yorkshire. They would have several children.

In 1924, Summers received a short-service commission as an officer in the Royal Air Force. He trained as a pilot with No. 2 Flight Training Squadron, at RAF Duxford. He was hospitalized for six months, which delayed his training, but he graduated in 1924 and was assigned to No. 29 Fighter Squadron. Summers was considered to be an exceptional pilot, and with just six months’ operational experience, he was assigned as a test pilot at the Aircraft and Armaments Engineering Establishment (A&AEE) at RAF Martlesham Heath. He remained there for the reminder of his military service. In June 1929 he became a test pilot for Vickers Ltd. (Aviation Department). He became the company’s chief test pilot in 1932.

During his career as a test pilot, “Mutt” Summers made the first flights of 54 prototype aircraft, including the Spitfire, the Vickers Type 618 Nene-Viking, the Vickers Type 630 Viscount four-engine turboprop airliner, and the Vickers Type 667 Valiant, a four-engine jet bomber. He flew more than 5,600 hours in 366 different aircraft types.

“Mutt’s approach to test flying was much more in sympathy with the knee-pad than with the complicated automatic observers which nowadays are an indispensable part of test flying. He vigorously defended the feel of an aeroplane as measured by his hand or by the seat of his pants, and I believe was always suspicious of the scientific approach. . . One learned never to regard his criticism or advice lightly. In a world of science and instrumentation his judgement and horsesense often threw an unscientific but accurate light on some dark problem.” —Sir George R. F. Edwards, OM, CBE, FRS, DL, Executive Director of the British Aircraft Corporation, quoted in Flight and Aircraft Engineer, No. 2357, Vol. 65, Friday, 26 March 1954, at Page 355, Column 2.

Joseph Summers, Esq., was appointed an Officer of the Most Excellent Order of the British Empire, Civil Division (O.B.E.), in His Majesty’s New Year’s Honours, Wednesday, 9 January 1946. He was promoted to Commander of the Most Excellent Order of the British Empire (Civil Division) (C.B.E.) in Her Majesty’s Coronation Honours, Monday, 1 June 1953.

Summers died 16 March 1954 at the age of 50 years.

¹ Air Ministry Specification F.37/34 High Speed Monoplane Single Seater Fighter

² FAI Record File Number 11833, World Record for Speed Over a 3-Kilometer Course: 364.92 kilometers per hour (226.75 miles per hour). Supermarine S.4, Henri Biard, 13 September 1925.

FAI Record File Number 14999, World Record for Speed Over 100 Kilometers: 531.20 kilometers per hour (330.07 miles per hour), Supermarine S.6, Henry Richard Danvers Waghorn, 7 September 1929.

FAI Record File Number 11831, World Record for Speed Over a 3-Kilometer Course: 655 kilometers per hour (407 miles per hour), Supermarine S.6B, George Hedley Stainforth, 29 September 1931.

© 2018, Bryan R. Swopes

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4 March 1954

Lockheed XF-104 prototype, 53-7786, photographed 5 March 1954. (Lockheed Martin)

4 March 1954: Lockheed test pilot Anthony W. LeVier takes the prototype XF-104 Starfighter, 53-7786, for its first flight at Edwards Air Force Base in the high desert of southern California. The airplane’s landing gear remained extended throughout the flight, which lasted about twenty minutes.

Lockheed XF-104 53-7786 on Rogers Dry Lake, Edwards Air force Base, California. (U.S. Air Force)
Lockheed XF-104 53-7786 rolling out on Rogers Dry Lake, Edwards Air Force Base, California. This photograph shows how short the XF-104 was in comparison to the production F-104A. Because of the underpowered J65-B-3 engine, there are no shock cones in the engine inlets. (U.S. Air Force via Jet Pilot Overseas)

Designed by the legendary Kelly Johnson, the XF-104 was a prototype Mach 2+ interceptor and was known in the news media of the time as “the missile with a man in it.”

Tony LeVier was a friend of my mother’s family and a frequent visitor to their home in Whittier, California.

Legendary aircraft designer Clarence L. “Kelly” Johnson shakes hands with test pilot Tony LeVier after the first flight of the XF-104 at Edwards Air Force Base. (Lockheed via Mühlböck collection)

There were two Lockheed XF-104 prototypes. Initial flight testing was performed with 083-1001 (USAF serial number 53-7786). The second prototype, 083-1002 (53-7787) was the armament test aircraft. Both were single-seat, single-engine supersonic interceptor prototypes.The XF-104 was 49 feet, 2 inches (14.986 meters) long with a wingspan of 21 feet, 11 inches (6.680 meters) and overall height of 13 feet, 6 inches (4.115 meters). The wings had 10° anhedral. The prototypes had an empty weight of 11,500 pounds (5,216 kilograms) and maximum takeoff weight of 15,700 pounds (7,121 kilograms).

The production aircraft was planned for a General Electric J79 afterburning turbojet but that engine would not be ready soon enough, so both prototypes were designed to use a Buick-built J65-B-3, a licensed version of the British Armstrong Siddeley Sapphire turbojet engine. The J65-B-3 was a single-shaft axial-flow turbojet with a 13-stage compressor section and 2-stage turbine. It produced 7,200 pounds of thrust (32.03 kilonewtons) at 8,200 r.p.m. The J65-B-3 was 9 feet, 7.0 inches (2.921 meters) long, 3 feet, 1.5 inches (0.953 meters) in diameter, and weighed 2,696 pounds (1,223 kilograms).

On 15 March 1955, XF-104 53-7786 reached a maximum speed of Mach 1.79 (1,181 miles per hour, 1,900 kilometers per hour), at 60,000 feet (18,288 meters).

XF-104 53-7786 was destroyed 11 July 1957 when the vertical fin was ripped off by uncontrollable flutter. The pilot, William C. Park, safely ejected.

Lockheed XF-104 55-7786. (Lockheed Martin)
Lockheed XF-104 53-7786 with wingtip fuel tanks. (Lockheed Martin)

Lockheed Martin has an excellent color video of the XF-104 first flight on their web site at:

http://www.lockheedmartin.com/us/100years/stories/f-104.html

© 2018, Bryan R. Swopes

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