Tag Archives: Armée de l’air

23 January 1939

H. Lloyd Child, Curtiss-Wright Airplane Division test pilot. (Photograph courtesy of Neil Corbett, Test & Research Pilots, Flight Test Engineers)

23 January 1939:

     Buffalo, N.Y., January 24—(AP)—A Curtiss Hawk 75A pursuit plane, one of 100 being constructed for the French Government, has “substantially exceeded all known speed records” with a free dive of more than 575 miles an hour, it was announced today.

     The speed mark was established yesterday while the ship was undergoing acceptance tests, officials of the Curtiss Aeroplane Division of the Curtiss Wright Corporation said.

     The tests were made by H. Lloyd Child, chief test pilot of the Buffalo Curtiss plant, who said he “felt no ill effects and did not realize” that the speed was presumably the fastest man has ever traveled.”

     National Aeronautic Association officials said that no Federation Aeronautique Internationale records “even approached this speed.”

     The speed of the dive was so great that the marker on the recording airspeed indicator exceeded the instrument’s range and moved off the paper on which the graph of the dive was recorded.

     Aviation experts, who declined to be quoted directly, estimated that the speed might have exceeded 600 miles per hour, compared with the normal falling rate for a 170-pound man of 150 miles an hour.

     The dive was begun at an altitude of 22,000 feet, and the record speed was attained during a 9,000 foot dive.

     At no time during the dive, Child said, did the engine exceed 2,550 revolutions a minute, its normal rated speed in level flight. Hence, he explained, the strain on the motor during the dive was not increased, but was held to the speed of normal operation by the Curtiss electric propeller, with its unlimited blade pitch range.

     Since the motor’s speed was kept at normal during the dive, it was a “free,” rather than a “power” dive as when the motor throttle is opened wide, aviation experts explained.

     Previously, company officials explained, a limiting factor in the speed at which an airplane could dive was the engine’s revolutions each minute, since overspeeding would result to serious damage to the motor.

     The Curtis Hawk 75A pursuit plane is similar to the Curtiss P-36A, the standard pursuit airplane of the United States Army Air Corps.

     It carried two machine guns and is equipped to carry bombs under each wing when on a fighting mission.

     The greatest previously registered speed was 440.681 miles an hour, made by Francesco Agello of Italy over a three-kilometer course in level flight October 23, 1934.

     The world’s land speed record is held by George E. T. Eyston of England at 357.5 miles an hour, established September 16, 1938.

The Cincinnati Enquirer, Vol. XCVIII, No. 291, Wednesday, January 25, 1939, at Page 1, Columns 1 and 2

A U.S. Army Air Corps Curtiss-Wright P-36 Hawk, 12 MD, assigned to Wright Field for flight testing. (U.S. Air Force)

The Oakland Tribune reported:

‘Faster Than Any Man Alive,’ Flier Says After Diving 575 M.P.H.

     BUFFALO, N.Y., Jan. 25.—(AP)—A test pilot who free-power dived a heavily armed pursuit airplane at more than 575 miles per hour claimed today the distinction of having traveled “faster than any other human being.”

     Chief test pilot H. Lloyd Child dropped a Curtiss Hawk 75A through the clouds above Buffalo Airport yesterday at almost 1000 feet a second to exceed “all known speed records,” the Curtiss aeroplane division of the Curtiss-Wright Corporation announced.

     Child was testing the plane for the French Army, which has purchased 100 of the ships. The terrific speed was recorded on instruments installed by the French Government’s representatives, who witnessed the flight.

     The velocity was so great the marker on the indicator exceeded the instrument’s range and moved off the paper roll. Aviation experts said Child probably exceeded 600 miles per hour.

     “I didn’t feel anything,” the test pilot commented, “it was all over too quickly.”

     Child said the dive was part of a day’s work.

     “No danger at all, I would say,” he commented.

     His spare time hobby, skiing, however, “is awful dangerous,” Child asserted.

     “I wouldn’t be surprised if someone would exceed my speed soon. A diving speed of 700 miles per hour is within the realm of possibility,” he added.

Oakland Tribune, VOL. CXXX—NO. 25, Wednesday, January 25, 1939, Page 3, Columns 2 and 3

The prototype Curtiss-Wright Model 75 Hawk, NX17Y, s/n 11923. (Curtiss-Wright Corporation)

The Curtiss-Wright Model 75 was a single-seat, single-engine, low wing monoplane with retractable landing gear. The airplane was designed by Donovan Reese Berlin. Curtiss-Wright intended to offer it as a pursuit for the U.S. Army Air Corps. H. Lloyd Child took the prototype, NX17Y, for its first flight 6 May 1935.

Donovan Reese Berlin. (Niagara Aerospace Museum)

After evaluation by the Air Corps at Wright Field, the rival Seversky Aircraft Corporation SEV-1XP was selected by the Air Corps and 77 P-35s were ordered. Don Berlin worked on improving the Model 75, and in 1937, the Air Corps ordered 210 Curtiss P-36As.

Curtiss-Wright P-36A Hawk. (U.S. Air Force)

Curtiss-Wright also offered versions of the Hawk 75 to foreign governments. Variants were available with fixed or retractable gear, a choice of Pratt & Whitney Twin Wasp or Wright Cyclone engines, and various combinations of machine gun and cannon armament.

The Curtiss Hawk 75 A was 28.8 feet (8.78 meters) long with wingspan of 37.3 feet (11.37 meters) and height of 9.25 feet (2.82 meters). The total wing area was 236.0 square feet (21.93 square meters). With a Pratt & Whitney engine, the airplane had an empty weight of 4,713 pounds (2,127.3 kilograms), and gross weight of 5,922 pounds (2,675.7 kilograms).

French Armée de l’air Curtiss H75-C1 chasseur. (Armée de l’air)

The Armée de l’air initially ordered 100 Hawk 75A-1s, designated H75-C1 in French service. Pratt & Whitney Twin Wasp engines (including spares) were ordered separately. They were delivered to France for final assembly, and were unpainted. These airplanes had minor differences from U.S. Army Air Corps P-36As. For example, the instrument markings were metric. It was French custom to have the throttle off when pushed full forward, and wide open when pulled rearward. The pilot’s seat was different in order to fit the standard French parachute.

The French H75-A1 was powered by an air-cooled, supercharged, 1,829.39-cubic-inch-displacement (29.97 liter) Pratt & Whitney Twin Wasp SC-G [Specification Number PW-5028-C]. This was a two-row 14-cylinder radial engine with a compression ratio of 6.7:1. The SC-G was rated at 900 horsepower at 2,550 r.p.m. at 11,000 feet (3,353 meters), and 1,050 horsepower at 2,700 r.p.m., for take off. The engine drove a three-bladed, 10 foot, 1½ inch (3.086 meters) diameter Curtiss Electric constant-speed propeller through a 16:9 gear reduction. The SC-G was 48.00 inches (1.219 meters) in diameter, 59.90 inches (1.521 meters) long, and weighed 1,423 pounds (645 kilograms).

The Hawk 75A-1 had a maximum cruise speed of 260 miles per hour (418 kilometers per hour) at 19,000 feet (5,790 meters). Its maximum speed was 258 miles per hour (413 kilometers per hour) at Sea Level, 290 miles per hour at 8,200 feet (2,500 meters), and 303 miles per hour (488 kilometers per hour) at 19,000 feet (5,790 meters). Although Child demonstrated a dive at over 575 miles per hour, in service, the Hawk was restricted to a maximum dive speed of 455 miles per hour (732 kilometers per hour). The airplane had a service ceiling of 32,800 feet (9,997 meters), and absolute ceiling of 33,700 feet (10,272 meters).

The Armée de l’air H75A-1 was armed with four FN-Browning de Belgique mle 1938 7.5 mm. × 54 mm MAS machine guns, with two mounted on the engine cowl, synchronized to fire through the propeller arc, and one in each wing. 2,200 rounds of ammunition were carried. The 7.5 mm (the bullet diameter was actually 7.78 mm, or .306-caliber) was a shorter, less powerful cartridge than the .303 British (7.7 × 56 mm) or U.S. standard .30-06 Springfield (7.62 × 63 mm) cartridges.

France followed with orders for Hawk 75A-2, 75A-3 and 75A-4 fighters. These had different combinations of guns and engine variants.

After the surrender of France to invaders from Nazi Germany, many Curtiss Hawks made their way to England. In service with the Royal Air Force, these airplanes were called the Mohawk.

Curtiss H75-C1s in service with France, World War II. (Armée de l’air)

Henry Lloyd Child was born at Philadelphia, Pennsylvania, 25 May 1904, the second of two children of Edward Taggart Child, a consulting engineer in shipbuilding, and Lillian Rushmore Cornell Child. He was baptized at the Church of the Good Shepherd, Rosemont, Pennsylvania, 22 December 1913. Child graduated from Flushing High School in Flushing, New York, then attended the Haverford School in Philadelphia.

Henry Lloyd Child, 1926. (The Class Record)

“Skipper” Child majored in mechanical engineering at the University of Pennsylvania where he was a member of the Hexagon Senior Engineering Society and the Phi Sigma Kappa (ΦΣΚ) and Sigma Tau (ΣΤ) fraternities. He was a member of the varsity and all-state soccer team, and also played football and tennis. Child graduated with a bachelor of science degree, 15 June 1926.

After graduation from college, Child went to work for the Curtiss-Wright Corporation as an engineer.

Child joined the United States Navy, 23 November 1927. He was trained as a pilot at Naval Air Station Hampton Roads, Norfolk, Virginia, and was commissioned as an Ensign. He was promoted to lieutenant (junior grade), 7 November 1932, and to lieutenant, 11 November 1935.

While maintaining his commission in the Navy, Child returned to Curtiss-Wright as a test pilot.

Mr. And Mrs. Henry Lloyd Child (née Allene Anne Gausby), 28 October 1939.

Henry Lloyd Child married Miss Allene Ann Gausby of Hamilton, Ontario, Canada, 28 October 1939. They had met in July 1938, while playing in a tennis tournament at Muskoka, Northern Ontario. They would have a daughter, Beverley L. Child.

Miss Allene Anne Gausby

H. Lloyd Child worked for Lockheed from 1958 to 1968, when he retired. He died at Palmdale, California 5 August 1970 at the age of 66 years.

H. Lloyd Child’s high speed dive was the subject of an 8-page article in “True Comics” #6, November 1941. (Parents’ Magazine Press)

See: http://comicbookplus.com/?dlid=24805

Curtiss advertisement, 1940. (Curtiss-Wright Corporation)

© 2018, Bryan R. Swopes

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28 September 1952

Dassault Mystère IV 01 (Dassault Aviation)
Dassault Mystère IV 01 (Dassault Aviation)

28 September 1952: At Aérodrome de Melun Villaroche, test pilot Kostia Rozanoff made the first flight of the Dassault MD.452 Mystère IV jet fighter prototype, 01. The flight lasted 25 minutes.

The aircraft was developed from the earlier Mystère II. The design specification called for the new fighter to reach Mach 1 in a dive. The wings were swept to 38° rather than the 30° of the II, and thinner, using a different curvature. The fuselage also had a different cross section. The new airplane reached 0.92 Mach in level flight and later in testing, broke the Sound Barrier in a dive.

Constantin Wladimir Rozanoff, Chief Pilot, Dassault Aviation, with a Mystère IV. (Photograph courtesy of Neil Corbett, Test and Research Pilots, Flight Test Engineers)
Constantin Wladimir Rozanoff, Chief Pilot, Dassault Aviation, with a Mystère IV. (Photograph courtesy of Neil Corbett, Test and Research Pilots, Flight Test Engineers)

The prototype used a Rolls-Royce RB.44 Tay turbojet engine, though production Mystère IV A aircraft used a license-built copy, the Hispano-Suiza Verdon 250.

The Mystère IV A was a single-place, single-engine swept wing jet fighter bomber capable of transonic speed. It was 12.85 meters (42 feet, 1.9 inches) long, with a wingspan of 11.12 meters (36 feet, 5.8 inches) and overall height of 4.46 meters (14 feet, 7.6 inches). The airplane had an empty weight of 5,850 kilograms (12,897 pounds). Maximum speed was 1,120 kilometers per hour (696 miles per hour). The service ceiling was 15,000 meters (49,213 feet).

The fighter bomber was armed with two 30 mm revolver cannons with 150 rounds of ammunition per gun, and up to 1,000 kilograms (2,200 pounds) of bombs on hardpoints under the wings.

411 Mystère IV A fighters were built by Société des Avions Marcel Dassault from 1954 to 1958. 242 were delivered to the Armée de l’air (the French Air Force).

© 2016, Bryan R. Swopes

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22 June 1962

Jacqueline Auriol climbs out of the cockpit of a Dassault Mirage IIIC. (Joyeux Magazine)

22 June 1962: At Istres, France, Société des Avions Marcel Dassault test pilot Jacqueline Marie-Thérèse Suzanne Douet Auriol flew a delta-winged Dassault Mirage III C interceptor to set a new Fédération Aéronautique Internationale (FAI) World Record for Speed Over a Closed Circuit of 100 Kilometers. Her average speed over the course was 1,850.2 kilometers per hour (1,149.7 miles per hour).¹ Mme. Auriol broke the record set 6 October 1961 by Jacqueline Cochran with a Northrop T-38A Talon.²

Dassault Mirage III C. (Dassault Aviation)

The Dassault Mirage III C was the first production variant of the Mirage series. It was a single-place, single-engine tailless-delta-wing interceptor designed for Armée de l’air (the French air force), with variants for export. It was designed as a light-weight fighter capable of Mach 2 speeds.

The Mirage III C was 45 feet, 5 inches (13,843 meters) long with a wingspan of 27 feet, 0 inches (8.230 meters) and height of 14 feet, 9 inches (4.496 meters.) The fuselage had a horizontal ellipse cross section and incorporated the Area Rule, similar to the delta wing Convair F-102A. The Mirage IIIC had an empty weight of 12,350 pounds (5,602 kilograms) and maximum takeoff weight of  max gross 22,860 pounds (10,369 kilograms).

The interceptor’s low-mounted delta wings used trailing edge flight controls, with ailerons outboard, elevators at the center and small trim tabs inboard. The leading edges were swept aft to 60° 34′ and there was 2° 30′ anhedral. The total wing area was 366 square feet (34.00 square meters).

The Mirage III C was powered by a Société nationale d’études et de construction de moteurs d’aviation (SNECMA) Atar 09C single shaft, axial-flow turbo-réacteur (turbojet engine) with afterburner. The engine used a 9-stage compressor section and 2-stage turbine. It was rated at 9,430 pounds of thrust (41.947 kilonewtons), and 13,669 pounds (60.803 kilonewtons) with afterburner. The Atar 09C was 5.900 meters (19 feet, 4.28 inches) long, 1.000 meters (3 feet, 3.37 inches) in diameter and weighed 1,456 kilograms (3,210 pounds).

When configured as a high-altitude interceptor, the Mirage could be equipped with a hypergolic liquid fueled Société d’Études pour la Propulsion par Réaction SEPR 841 rocket engine mounted under the rear fuselage. When the booster pack not used, a small additional fuel tank would be mounted in the same position.

The Dassault Mirage III C could climb to 30,000 feet (9,144 meters) in 3 minutes, 60,000 feet (18,288 meters) in 6 minutes, 10 seconds, and reach 72,000 feet (21,946 meters) in 9 minutes. It had an economical cruise speed of 0.9 Mach at 40,000 feet (12,192 meters), and maximum speed of Mach 2.3 at 36,000 feet (10,973 meters). The maximum range with external fuel tanks was 1,850 miles (2977 kilometers).

The interceptor was equipped with search radar and a missile targeting computer. Armament consisted of a modular gun pack with two Direction des Études et Fabrications d’Armement (DEFA) 5-52 autocannon with 125 rounds of ammunition per gun (the targeting computer had to be removed for this installation). A Nord AA.20 guided air-to-air missile could be carried under the fuselage on a centerline hardpoint, or a AS.30 air-to-ground missile. Both of these were controlled by the pilot through a cockpit joystick. Alternatively, two Sidewinder infrared-homing air to air missiles were carried on underwing pylons.

95 Mirage IIICs were built. The served with the Armée de l’air from 1961 to 1988.

Dassault Mirage III C No. 92. (Dassault Aviation)

¹ FAI Record File Number 12391.

² FAI Record File Number 13036: 1,262.19 km/h (784.29 miles per hour)

© 2018, Bryan R. Swopes

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