Nieuport-Delage NiD 640

Crew: 2
Capacity: 4 passengers
Wingspan: 15.40 m (50 ft 6¼ in)
Gross weight: 1900 kg (4189 lb)
Powerplant: 1 × Lorraine 7M Mizar radial engin, 179 kW (240 hp)

NiD 640
Role	four-seat cabin monoplane
National origin	France
Manufacturer	Nieuport-Delage
First flight	1927
Introduction	1930
Primary user	Société des Transports Aériens Rapides
Number built	14

The Nieuport-Delage NiD 640 was a French four-passenger transport monoplane built by Nieuport-Delage as a smaller version of the earlier NiD 540.

Development

The NiD 640 was an all-wood high-wing cantilever monoplane powered by a nose-mounted radial engine. An enclosed cockpit for two-crew forward of the wing and a cabin for four passengers was aft. The NiD 640 was powered by 220 hp (164 kW) Wright J-5C radial engine and was followed by 12 production aircraft designated NiD 641 powered by a 240 hp (179 kW) Lorraine 7M Mizar radial engine. The NiD 640 was converted to an ambulance aircraft and later had a Mizar engine fitted to bring it up to 641 standard. One aircraft was powered by an Armstrong Siddeley Lynx Major engine and designated the NiD 642 but it did not find a buyer and was scrapped. Seven Ni-D 641 aircraft were flown by Société des Transports Aériens Rapides (STAR), a subsidiary of Nieport-Delage, on cargo and passenger services from Paris.

Variants

NiD 640: Prototype with a 220hp (164kW) Wright J-5C radial engine, one built later converted to a 641.
NiD 641: Production aircraft with a 240hp (179kW) Lorraine 7M Mizar radial engine, 12 built.
NiD 642: Powered by an Armstrong Siddeley Lynx Major engine, one built.