25 September 1920

Test pilot Joseph Sadi-Lecointe with a Nieuport Delâge Ni-D 40R World record-setting biplane.
Test pilot Joseph Sadi-Lecointe with a Nieuport Delâge Ni-D 40R World Altitude Record-setting biplane, circa 1923. (Bibliothèque nationale de France)

25 September 1920: At Villesauvage-La Marmogne, France, Joseph Sadi-Lecointe flew a Nieuport-Delâge Ni-D 29V to set a Fédération Aéronautique Internationale (FAI) World Record for Speed Over 100 Kilometers. His average speed was 279.50 kilometers per hour (173.67 miles per hour).¹

Three days later, 28 September 1920, Sadi-Lacointe won the Gordon Bennett Aviation Trophy Race with a Ni-D 29V. He set four FAI world speed records with these airplanes, reaching a maximum 302.53 kilometers per hour (187.98 miles per hour) on 20 October 1920.²

Nieuport-Delâge Ni-D 29V
One of three Nieuport-Delâge Ni-D 29V racers. Sadi-Lecointe flew this airplane, #10, to win the Gordon Bennett Aviation Trophy. (Unattributed)

Sadi-Lecointe’s Ni-D 29V was one of three racing variants of the highly successful single-engine, single-seat Ni-D 29C.1 biplane fighter, which was the fastest in the world at the time. The Ni-D 29V was 21 feet, 3.5 inches (6.489 meters) long, with a wing span of just 6.00 meters (19 feet, 8¼ inches), shortened from the 31 feet, 10 inch (9.703 meters) wingspan of the standard production chasseur.

This right rear-quarter view of a Nieuport-Delâge Ni-D 29V shows the shortned single-bay wing configuration. (United States Air Force)
This right rear-quarter view of one of the three Nieuport-Delâge Ni-D 29V racers shows the shortened single-bay wing configuration. (United States Air Force)

The airplane was powered by a water-cooled, normally aspirated, 1,127.29-cubic-inch displacement (18.47 liter) right-hand tractor Hispano-Suiza 8Fb single overhead cam (SOHC) 90° V-8 engine, modified to increase its output to 320 horsepower. This was a direct-drive engine, and turned a two-bladed-fixed pitch propeller.

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).

Nieuport-Delâge Ni-D 29C.1, s/n 12002, right front quarter view.
Nieuport-Delâge Ni-D 29 C.1, s/n 12002, right front quarter view. (worldmilitary.net)
Nieuport-Delâge Ni-D 29C.1, s/n 12002, right profile.
Nieuport-Delâge Ni-D 29 C.1, s/n 12002, right profile. A well-known landmark can be seen at the left edge of the photograph. (worldmilitary.net)
Nieuport-Delâge Ni-D 29C.1, s/n 12002, right rear three-quarter view.
Nieuport-Delâge Ni-D 29 C.1, s/n 12002, right rear three-quarter view. (worldmilitary.net)

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 Nieuport 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 BlériotSociété Pour L’Aviation et ses Dérivés, where he worked on the development of the famous SPAD S.XIII C.1 fighter.

Joseph Sadi-Lecointe was a test pilot for the Société Pour L’Aviation et ses Dérivés SPAD S.XIII C.1 fighter
Sous-Lieutenant Joseph Sadi-Lecointe was a test pilot for the Société Pour L’Aviation et ses Dérivés SPAD S.XIII C.1 fighter. (Bibliothèque nationale de France)

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 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.

Joseph Sadi-Lecointe. (FAI)
Joseph Sadi-Lecointe.  (FAI)

¹ FAI Record File Number 15489

² FAI Record File Number 15499

© 2017, Bryan R. Swopes

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