Tag Archives: Prototype

21 July 1946

Aviation, , , , , , , ,
The second McDonnell XFD-1 Phantom prototype, Bu. No. 48236, lands aboard USS Franklin D. Roosevelt (CVB-42), 21 July 1946. Lieutenant Commander James Jennings Davidson, U.S.N., is in the cockpit. (U.S. Navy)

21 July 1946: Lieutenant Commander James Jennings Davidson, United States Navy, flying the second prototype McDonnell XFD-1 Phantom, made four takeoffs and landings aboard the Midway-class aircraft carrier USS Franklin D. Roosevelt (CVB-42). This was the very first time that an all-jet aircraft had operated from a U.S. Navy aircraft carrier.¹

USS Franklin D. Roosevelt (CVB-42) cruising the Mediterranean Sea, November 1948. (U.S. Navy)
McDonnell XFD-1 Phantom Bu. No. 48236 crosses the arresting cables aboard USS Franklin D. Roosevelt (CVB-42), 21 July 1946. (U.S. Navy)
McDonnell XFD-1 Phantom Bu. No. 48236 takes off from USS Franklin D. Roosevelt (CVB-42), 21 July 1946. The pilot is Lieutenant Commander James Jennings Davidson, U.S.N. (U.S. Navy)

The McDonnell XFD-1 Phantom was a prototype turbojet-powered fighter, one of two designed and built by the McDonnell Aircraft Corporation at St. Louis, Missouri. It was a single-place, twin-engine, low-wing monoplane with retractable tricycle landing gear, intended for operations from the United States Navy’s aircraft carriers. The XFD-1 was 37 feet, 2.50 inches (11.341 meters) long, with a wingspan of 42 feet, 0.00 inches (12.802 meters) and height of 13 feet, 2.00 inches (5.105 meters). With its wings folded for storage, the span was reduced to 15 feet, 4.00 inches (4.674 meters), but the overall height increased to 16 feet, 9.00 inches (5.105 meters). The airplane had a normal gross weight of 8,250 pounds (3,742 kilograms), and an overload gross weight of approximately 9,700 pounds (4,400 kilograms).

McDonnell XFD-1 Phantom.

The XFD-1 was powered by two Westinghouse 19B (J30-WE- ) engines. The engines were positioned on either side of the fuselage, inside the wing roots. By keeping the engines close to the airplane’s center of gravity, it was more maneuverable, and had less adverse yaw when operating on a single engine. The Westinghouse 19B was a single-spool axial flow turbojet. It used a six-stage compressor section with a single-stage turbine. There is conflicting information as to the specific engine variant, and their thrust, but the 19B as installed in the XFD-1 was rated at 15,500 r.p.m for cruise, with a Normal (continuous) rating of 17,000 r.p.m., and a Military/War Emergency Power rating of 18,000 r.p.m. The Westinghouse 19B was 19.0 inches (0.483 meters) in diameter, 94.0 inches (2.388 meters) long, and weighed 826 pounds (375 kilograms).

One of the two McDonnell XFD-1 Phantom prototypes. (SDASM)

Both XFD-1 prototypes were lost before flight testing was completed, so performance data is limited. They were limited to a maximum speed of 0.66 Mach. (The test pilot was provided with a chart for the equivalent indicated air speed (IAS) at specific altitudes.) The speed in a dive was limited to 265 knots (305 miles per hour/491 kilometers per hour) at 10,000 feet (3,048 meters). The airframe was restricted to a maximum 5gs acceleration. Spins, snap rolls and inverted flight were prohibited. Contemporary reports were that the Phantom was faster than 500 miles per hour (805 kilometers per hour). Its ceiling was over 35,000 feet (10,668 meters), and its range was 1,000 miles (1,610 kilometers).

The XFD-1 was armed with four Browning .50-caliber machine guns grouped together in the nose, with 250 rounds of ammunition per gun.

The first prototype, Bu. No. 48235, made its first flight 26 January 1945, flown by test pilot Edwin Woodward (“Woody”) Burke, but it crashed 1 November 1945. Burke, the pilot, was killed. The second prototype, Bu. No. 48236, crashed 26 August 1946.

McDonnell built 62 FD-1 Phantoms (redesignated FH-1 in 1947) before production shifted to the larger F2H-1 Banshee.

Left to right, Lieutenant Commander James Jennings Davidson, with Vice Admiral Arthur William Radford, Deputy Chief of Naval Operations for Air, and Vice Admiral Gerald Francis Bogan, Commander, Air Force, Atlantic Fleet, aboard U.S.S. Franklin D. Roosevelt (CVB-42). Photo released 22 July 1946. (U.S. Navy via Navy Pilot Overseas)
Captain James Jennings Davidson, United States Navy

James Jennings Davidson was born 19 July 1919 at Sparta, Wisconsin. He was the second of three children of David Davidson, a farmer, and Clara Josephine Gilbertson. He attended Lewiston High School, and the the Wisconsin State Teacher’s College at Winona. He graduated in 1940 with a Bachelor of Science degree (B.S.) in Science Education.

While at college, Davidson participated in the Civilian Pilot Training program.

Davidson enlisted in the United States Navy as an aviation cadet, 25 November 1940. He underwent flight training at NAS Corpus Christi, Texas. On completing flight school, Davidson was awarded the gold wings of a Naval Aviator, and commissioned as an ensign, U.S. Navy, with date of rank from 4 August 1941.

Ensign Davidson married Miss Muriel Juliet Mindrum in March 1942. They would have a daughter, Barbara Claire Davidson.

During World War II, Davidson flew the Douglas SBD Dauntless and Curtiss-Wright SB2C Helldiver dive bombers. Davidson was promoted to the temporary rank of lieutenant 1 October 1943. The rank was made permanent, with date of rank retroactive to 4 August 1941.

In 1944, Lieutenant Davidson was assigned to Naval Air Test Center at NAS Anacostia, at Washington, D.C. Davidson was promoted to the rank of lieutenant commander, 3 October 1945. He later attended the United Kingdom’s Empire Test Pilots’ School.

During the Korean War, Lieutenant Commander flew combat missions in the Grumman F9F Panther. He was promoted to commander, 1 July 1953. Later in his career, Commander Davidson served aboard USS Kearsarge (CV-33); and commanded Fighter Squadron Fifty-Two (VF-52).

Commander Davidson was promoted to the rank of captain, 1 July 1960, and commanded Carrier Air Group 14 (CVG 14) aboard USS Ranger (CV-61).

USS Ranger (CVA-61), August 1961. (United States Navy)

Captain Davidson retired from the U.S. Navy in July 1972. He died at Prince William, Virginia, 5 December 1993, and was buried at the Arlington National Cemetery, Arlington, Virginia.

¹ The very first jet landings and takeoffs had occurred over seven months earlier, 3 December 1945, when Lieutenant-Commander Eric Melrose Brown, D.S.C., Royal Navy Volunteer Reserve, flying a de Havilland DH.100 Vampire, made several takeoffs and landings aboard the Royal Navy aircraft carrier, HMS Ocean (R68).

© 2018, Bryan R. Swopes

18 July 1942

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Test pilot Fritz Wendel with the Messerschmitt Me 262 V3 prototype, PC+UC. (Photograph courtesy of Neil Corbett, Test and Research Pilots, Flight Test Engineers)
Chief Test Pilot Fritz Wendel with the Messerschmitt Me 262 V3 prototype, PC+UC. (Photograph courtesy of Neil Corbett, Test and Research Pilots, Flight Test Engineers)
Test Pilot Fritz Wendel (L) talks with Willy Messerschmitt after the maiden flight of Me 262 V3.
Test Pilot Fritz Wendel (left) talks with Willy Messerschmitt after the maiden flight of Me 262 V3, 18 July 1942.

18 July 1942: In the late 1930s, Germany began developing a fighter powered by a turbojet engine. In early 1942 the first two prototypes of the Messerschmitt Me 262 began flight testing. They had two BMW 003 jet engines mounted on the wings, but for safety, a piston engine and propeller were mounted in the nose.

At 8:40 a.m. on 18 July 1942, V3, the third prototype, call sign PC+UC, made its first pure-jet flight when it took off from Leipheim, Bavaria, with Messerschmitt’s Chief Test Pilot, Flugkapitän Fritz Wendel. (The first true turbojet-powered aircraft, the Heinkel He 178 V-1, first flew almost three years earlier, 27 August 1939).

This prototype was powered by two Junkers Jumo 004 turbojet engines. The Jumo 004 had an eight-stage axial flow compressor, six straight through combustion chambers and a single-stage turbine. It produced 1,850 pounds of thrust (8.23 kilonewtons).

Messerschmitt Me 262 V3, PC+UC, takes off on its first flight at Leipheim, 18 July 1942.
Messerschmitt Me 262 V3, PC+UC, takes off on its first flight at Leipheim, 18 July 1942.

There were problems created by the airplane’s use of a tailwheel configuration. Turbulence from the wings and reflected jet exhaust blanked out the tail surface. When the Me 262 prototype reached flying speed, Wendel tapped the brakes. The tail popped up, free of the turbulence, and the jet fighter took off. Beginning with the fifth prototype, V5, all Me 262s were built with tricycle landing gear.

Messerschmitt Me 262 V3, PC+UC
Messerschmitt Me 262 V3, PC+UC

The Messerchmitt Me 262 Schwalbe was the first production jet fighter, preceding the British Gloster Meteor Mk.III into operational service by about three months. It was a single-place, twin-engine airplane with the engines placed in nacelles under the wings. It was 10.6 meters (34 feet, 9.3 inches) long with a wingspan of 12.51 meters (41 feet, 5.2 inches) and overall height of 3.85 meters (12 feet, 7.6 inches). According to Fay, the fighter’s empty weight was 3,760 kilograms (8,289 pounds) and the maximum gross weight was 7,100 kilograms (15,653 pounds) at engine start.¹

The Me-262 wings had 6° dihedral. The leading edges were swept aft to 20°, while the trailing edges of the inner panels swept forward 8½° to the engine nacelle, then outboard of the engines, aft 5°. The purpose of the sweep was to keep the airplane’s aerodynamic center close to the center of gravity, a technique first applied to the Douglas DC-2. The total wing area was 21.7 square meters (233.6 square feet).

Messerschmitt test pilot Hans Fay told Allied interrogators that, for acceptance, the production Me 262 was required to maintain a minimum of 830 kilometers per hour (515 miles per hour) in level flight, and 950 kilometers per hour (590 miles per hour) in a 30° dive. The fighter’s cruise speed was 750 kilometers per hour (466 miles per hour).

A number of factors influenced the Me 262’s maximum range, but Fay estimated that the maximum endurance was 1 hour, 30 minutes. U.S. Air Force testing establish the range as 650 miles (1,046 kilometers) and service ceiling at 38,000 feet (11,582 meters).

The Jumo 004 was tested at the NACA Aircraft Engine research Laboratory, Cleveland, Ohio, in March 1946. (NASA)

The Me 262 A-1 was powered by two Junkers Jumo TL 109.004 B-1 turbojet engines. The 004 was an axial-flow turbojet with an 8-stage compressor section, six combustion chambers, and single-stage turbine. The 004 engine case was made of magnesium for light weight, but this made it vulnerable to engine fires. The engine was designed to run on diesel fuel, but could also burn gasoline or, more commonly, a synthetic fuel produced from coal, called J2. The engine was first run in 1940, but was not ready for production until 1944. An estimated 8,000 engines were built. The 004 B-1 idled at 3,800 r.p.m., and produced 1,984 pounds of thrust (8.825 kilonewtons) at 8,700 r.p.m. The engine was 2 feet, inches (0.864 meters) in diameter, 12 feet, 8 inches (3.861 meters) long, and weighed 1,669 pounds (757 kilograms).

Cutaway illustration of Jumo 004 engine.

The Me 262 A-1 was armed with four Rheinmetall-Borsig MK 108 30 mm autocannons with a total of 360 rounds of ammunition. (The Me 262 A-2 had just two autocannons with 160 rounds.) It could also be armed with twenty-four  R4M Orkan 55 mm air-to-air rockets. Two bomb racks under the fuselage could each be loaded with a 500 kilogram (1,102 pounds) bomb.

1,430 Me 262s were produced. They first entered service during the summer of 1944. Luftwaffe pilots claimed 542 Allied airplanes shot down with the Me 262.

Messechmitt Me 262A-1, WNr. 1117111. (U.S. Air force)

© 2023, Bryan R. Swopes

17 July 1989

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Bruce J. Hinds and Richard Couch. (Photograph courtesy of Neil Corbett, Test and Research Pilots, Flight Test Engineers)

17 July 1989: The first Northrop B-2A Spirit, 82-1066, took off from Air Force Plant 42, Palmdale, California, on its first flight. The crew was Northrop Chief Test Pilot Bruce J. Hinds and Colonel Richard Couch, U.S. Air Force. The top secret “stealth bomber” prototype landed at Edwards Air Force Base 1 hour, 52 minutes later.

After completing the flight test program, -1066 was placed in storage until 1993, awaiting upgrade to the Block 10 operational configuration. In 2000 it was again upgraded to the Block 30 standard. It is now named Spirit of America and assigned to the 509th Bomb Wing at Whiteman Air Force Base, Missouri.

Northrop B-2A Spirit, 82-1066, the first “stealth bomber,” during a test flight. (U.S. Air Force)

The Northrop B-2A Spirit is an advanced technology long-range heavy bomber. It can perform both tactical or strategic missions. It features extremely low radar observabilty. The bomber features the “flying wing” concept, pioneered by the Northrop XB-35 in 1946. In addition to its “stealthy” configuration, the B-2A is also highly aerodynamically efficient.

Northrop B-2A Spirit 82-1066 ready for its first flight. TDiA believes that the orange triangles on the prototype’s leading edges are radar reflectors.

The B-2A has a crew of two pilots. According to data released by the U.S. Air Force, the bomber is 69 feet (21.0 meters) long, with a wingspan of 172 feet (52.4 meters) and height of 17 feet (5.2 meters). Its empty weight is 160,000 pounds (72,575 kilograms), with a maximum takeoff weight is 336,500 pounds.

Three view diagram of a Northrop B-2A, with dimensions.

Th B-2A is powered by four General Electric F118-GE-100 turbofan engines. The F118 is a non-afterburning two-spool axial-flow turbofan with a single stage fan section, 11-stage compressor (2 low- and 9 high-pressure stages) and 3-stage turbine (1 high- and 2 low-pressure stages). It is rated at 19,000 pounds (84.5 kilonewtons) thrust. The F118-GE-100 is 100.5 inches (2.553 meters) long, 46.5 inches (1.181 meters) in diameter and weighs 3,200 pounds (1,451 kilograms).

The maximum speed of the B-2A is “high subsonic,” and its range is “intercontinental.” The service ceiling is 50,000 feet (15,240 meters).

The B-2A can carry a variety of conventional or thermonuclear bombs, including sixteen 2,000 pound (907 kilogram) bombs, or two GBU-57 Massive Ordnance Penetrators.

Northrop produced twenty-one B-2As between 1987 and 2000. The first operational bomber was delivered in 1993. One was destroyed when it crashed on takeoff at Anderson AFB, Guam, 23 February 2008.

© 2023, Bryan R. Swopes

17 July 1965

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North American Aviation XB-70A-2-NA 62-0207 takes off for the first time at AF Plant 42, 17 July 1965. (U.S. Air Force)

17 July 1965: At Air Force Plant 42, Palmdale, California, the second North American Aviation B-70 Valkyrie prototype, XB-70A-2-NA 62-0207, took off on its maiden flight enroute Edwards Air Force Base where it would continue the flight test program with its sister ship.

The Valkyrie was designed as a Mach 3+ strategic bomber, capable of flight above 70,000 feet (21,336 meters), with intercontinental range. It’s altitude allowed it to avoid interceptors of the time, but improvements in radar-guided surface-to-air missiles increased its vulnerability. Ultimately, though, political decisions ended the B-70 program.

62-0207 was flown just 46 times, for a total of 92 hours, 22 minutes of flight. Changes to the aircraft corrected the deficiencies discovered in testing the Number 1 XB-70A, 62-0001. The most visible change was 5° dihedral added to the wings for improved stability. On 16 April 1966, 62-0207 reached its maximum design speed, Mach 3.08, which it sustained for 20 minutes.

Less than one year after its first flight, 8 June 1966, the Valkyrie was involved in a mid-air collision with a Lockheed F-104N and crashed just north of Barstow, California. North American’s B-70 test pilot, Al White, was seriously injured and co-pilot, Major Carl Cross, USAF, was killed. NASA test pilot Joe Walker, flying the F-104, was also killed.

© 2015, Bryan R. Swopes

16 July 1935

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The Boeing 299 is rolled out for the first time, 16 July 1935. (Boeing photograph via Seattle Post-Intelligencer)

16 July 1935: Just over a year after design began, the Boeing Model 299, X13372,¹ a prototype four engine long range heavy bomber, was rolled out of its hangar at Boeing Field, Seattle, Washington for the first time. The largest land airplane built up to that time, it seemed to have defensive machine guns aimed in every direction. A Seattle Times reporter, Roland Smith, wrote that it was a “flying fortress.” Boeing quickly copyrighted the name.

After several years of testing, the Model 299 went into production as the B-17 Flying Fortress. By the end of World War II, 12,731 B-17 Flying Fortresses had been built by Boeing, Douglas and Lockheed Vega.

Rollout of teh Boeing Model 299, NX13372, prototype XB-17. (Museum of Science and Industry)
Rollout of the Boeing Model 299, X13372, prototype XB-17. (Museum of Science and Industry via Seattle Post-Intelligencer)

The Boeing Model 299 was a four-engine bomber operated by a crew of eight. It was designed to meet a U.S. Army Air Corps proposal for a multi-engine bomber that could carry a 2,000 pound (907 kilogram) bomb load a distance of 2,000 miles (3,219 kilometers) at a speed greater than 200 miles per hour (322 kilometers per hour). Design of the prototype began in June 1934 and construction was started 16 August 1934. The Air Corps designated it B-299, and later, XB-17. It did not carry a military serial number, being marked with civil registration NX13372.

The Model 299 was 68 feet, 9 inches (20.955 meters) long with a wingspan of 103 feet, 9–3/8 inches (31.633 meters) and height of 14 feet, 11–5/16 inches (4.554 meters). Its empty weight was 21,657 pounds (9,823 kilograms). The maximum gross weight was 38,053 pounds (17,261 kilograms).

The prototype was powered by four air-cooled, supercharged, 1,690.537-cubic-inch-displacement (27.703 liter) Pratt & Whitney Hornet S1E-G nine-cylinder radial engines with a compression ratio of 6.5:1. The S1E-G was rated at 750 horsepower at 2,250 r.p.m., and 875 horsepower at 2,300 r.p.m. for takeoff, using 87-octane gasoline. They turned 11 foot, 6 inch (3.505 meters) diameter, three-bladed Hamilton Standard Hydromatic constant-speed propellers through a 3:2 gear reduction. The S1E-G was 4 feet, 1.38 inches (1.254 meters) long, 4 feet, 6.44 inches (1.383 meters) in diameter and weighed 1,064 pounds (483 kilograms)

Cockpit of the Boeing Model 299. (U.S. Air Force)
Cockpit of the Boeing Model 299. (Boeing)

In flight testing, the Model 299 had a cruise speed of 204 miles per hour (328 kilometers per hour) and a maximum speed of 236 miles per hour (380 kilometers per hour) at 10,000 feet (3,048 meters). The service ceiling was 24,620 feet (7,504.2 meters). The maximum range was 3,101 miles (4,991 kilometers). Carrying a 2,573 pounds (1,167 kilograms) load of bombs, the range was 2,040 miles (3,283 kilometers).

Boeing XB-17 (Model 299) bombers and front gunners compartment. (U.S. Air Force photo) 060706-F-1234S-007
Nose turret of the Boeing Model 299, with .50-caliber machine gun, photographed 24 July 1935. (Boeing 8195)
Bomb sight position., 9 August 1935. (Boeing 8227-B)

The XB-17 could carry eight 500 pound (227 kilogram) bombs in an internal bomb bay. Defensive armament consisted of five air-cooled .30-caliber or .50-caliber Browning machine guns.

Starboard waist gunnner’s position of the Boeing 299. (Boeing)
Starboard waist gunners position, with Browning M2 .50-caliber machine gun and ammunition canisters. (Boeing)

NX13372 was destroyed when it crashed on takeoff at Wright Field, Dayton, Ohio, 30 October 1935. An Army Air Corps pilot making his first familiarization flight neglected to remove the control locks. This incident led directly to the creation of the “check list” which today is used by all aircraft crew members.

Boeing Model 299, left quarter, at Boeing Field, south of Seattle, Washington,August 1935. (Boeing)
Boeing Model 299, NXxxx72, the prototype XB-17. (U.S. Air Force)
Boeing Model 299, X13372, the prototype XB-17, at Wright Field, Ohio. (U.S. Air Force)
Boeing Model 299, left profile, at Boeing Field, 13 August 1935. (Boeing 8234-B)
Boeing Model 299 NX13372, designated XB-17, at Wright Field, Ohio, 1935. (U.S. Air Force)
Boeing Model 299 X13372, designated XB-17, at Wright Field, Ohio, 1935. (U.S. Air Force)
Boeing 299 X13372, all engines running.

¹ At that time, experimental and restricted category aircraft were prohibited from displaying the letter “N” at the beginning of their registration mark.

© 2018, Bryan R. Swopes