7 February 1920: Joseph Sadi-Lacointe was the first pilot to set a new Fédération Aéronautique Internationale (FAI) World Speed Record after the end of World War I. At Villacoublay, France, Sadi-Lecointe flew an Avion Nieuport—Type Gordon Bennett 1920 ¹ over a 1 kilometer (0.621 mile) course at an average speed of 275.86 kilometers per hour (171.41 miles per hour).²

Sadi-Lecointe’s Ni-D 29V was one of three racing variants of the highly successful single-engine, single-seat Ni-D 29 C.1 biplane fighter, which was the fastest in the world at the time.

Like the chasseur (fighter), the Ni-D 29V was a single-bay biplane. It was 6.200 meters (20 feet, 4.1 inches) long, with a wing span of just 6.000 meters (19 feet, 8.2 inches), shortened from the 31 feet, 10 inch (9.703 meters) wingspan of the standard production airplane. The airplane’s height was 2.500 meters (8 feet, 8.4 inches). It weighed 936 kilograms (2,064 pounds), empty. Maximum fuel capacity was 160 kilograms (353 pounds).

The airplanes were altered over time, with variations in wing span. For example, for one speed record attempt, the engine output was increased to 330 horsepower; the two Lamblin radiators were removed to reduce aerodynamic drag; and fuel capacity was restricted to just 40 kilograms (88 pounds). The resulting speed was 302.313 km/h (187.849 miles per hour).³

The airplane was powered by a water-cooled, normally aspirated, 18.473 liter (1,127.265-cubic-inch displacement) right-hand tractor Hispano-Suiza 8Fb single overhead cam (SOHC) 90° V-8 engine with a compression ratio of 5.3:1. The production engine was rated at 300 cheval vapeur at 2,100 r.p.m. The Ni-D 29V engine modified to increase its output to 320 horsepower. This was a direct-drive engine, and turned a two-bladed-fixed pitch propeller. The engine was 1.32 meters (4 feet, 4 inches) long, 0.89 meters (2 feet, 11 inches) wide, and 0.88 meters (2 feet, 10½ inches) high. It weighed 256 kilograms (564 pounds).

Engine cooling was provided by Lamblin cylindrical radiators mounted under the lower wing.

The standard airplane had a top speed of 235 kilometers per hour (146 miles per hour), a range of 580 kilometers (360 miles) and a service ceiling of 8,500 meters (27,887 feet).

Joseph Sadi-Lecointe learned to fly in 1910. The Aero Club de France awarded him its license number 431 on 10 February 1910.

He joined the Service Aéronautique (the original form of the French Air Force) as a mechanic in October 1912, and was designated pilote militaire nº375, 20 September 1913. He served as a pilot during World War I, flying the Blériot XI-2, Morane LA and Nieuprt X, then in December 1915 became a flight instructor at l’Ecole de Pilotage d’Avord. Sadi-Lacointe was promoted from the enlisted ranks to sous-lieutenant, 17 September 1917, and was assigned as a test pilot at Blériot–Société Pour L’Aviation et ses Dérivés, where he worked on the development of the famous SPAD S.XIII C.1 fighter.

After the War, he was a test pilot for Nieuport-Delâge, and participated in numerous races and set a series of speed and altitude records with the company’s airplanes.

Sadi-Lecointe returned to military service in 1925 and participated in the Second Moroccan War. Then in 1927, he returned to his position as chief test pilot for Nieuport-Delâge. From 1936 to 1940, he served as Inspecteur général de l’aviation civile (Inspector General of Aviation) for the French Air Ministry. With the outbreak of World War II in 1939, Lieutenant Colonel Sadi-Lecointe was again recalled to military service as Inspector of Flying Schools.

With the Fall of France, Sadi-Lacointe joined La Résistance française, and operated with the group, Rafale Andromède. He was captured and tortured by the Gestapo at Paris, and died as a result, 15 July 1944.

Joseph Sadi-Lecointe, Commandeur Ordre national de la Légion d’honneur, was awarded the Croix de Guerre in three wars. He was posthumously awarded the Médaille de la Résistance. The Aéro-Club de France awarded him its Grande Médaille d’Or de l’Aéro-Club de France. During his flying career, Sadi-Lecointe set seven World Records for Speed, and three World Records for Altitude.

MORT POUR LA FRANCE

¹ The Avion Nieuport—Type Gordon Bennett 1920 is also known as the Nieuport-Delâge NiD 29V

²  FAI Record File Number 15467

³ FAI Record File Number 15499

© 2019, Bryan R. Swopes