Nieuport-Delage NiD 37

NiD 37
Nieuport-Deage NiD.37 fighter at the 1922 Paris Show
Role	Single-seat fighter
National origin	France
Manufacturer	Nieuport-Delage
Designer	E. Dieudonné
First flight	April 1923
Number built	1

The Nieuport-Delage NiD 37 was a single-engine, single-seat monoplane fighter aircraft and racer designed and built in France in the early 1920s. It had a small foreplane to bring the centre of pressure forward. Heavy, slower than expected and with turbo-supercharger problems, it was not developed.

Though the NiD 37 has sometimes been termed a sesquiplane, it is better described as a shoulder-wing monoplane with a small foreplane. Its immediate predecessor was the NiD 31, which had a similar layout though its foreplane was much less far forward than that of the NiD 37. The two also differed in detail throughout, notably in wing plan and bracing, cockpit position and engine.

The fuselage of the NiD 37 was constructed in Nieuport-Delage's usual way, a monocoque shell of spirally wound tulipwood glued together and with a final outer fabric covering. This gave a smooth finish to the circular cross section structure which tapered gently to the tail but had a rather abrupt, dome-shaped nose housing the 224 kW (300 hp) Hispano-Suiza 8Fb water-cooled V-8 engine and its Rateau () turbo-supercharger. The engine was mounted with its output shaft low down in the nose and drove a two-blade propeller. Though this was of the wooden, fixed-pitch type, it was intended that it would be replaced by a variable-pitch Lavasseur airscrew later. A single, roughly cylindrical Lamblin radiator was suspended below the engine, between the undercarriage legs.

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