Couzinet 70

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70 Arc-en-Ciel
Avion Couzinet 70 a l'atterrissage.jpg
Role Long-range commercial monoplane
Manufacturer Société des Avions René Couzinet
First flight 11 February 1932
Introduction May 1934
Primary user Aéropostale
Produced 3

The Couzinet 70 was a 1930s French three-engined commercial monoplane built by Société des Avions René Couzinet founded by René Couzinet.

Design and developments[edit]

The Couzinet 70 Arc-en-Ciel III (en Rainbow) was developed from the 1920s Couzinet 10 Arc-en-Ciel, which first flew on 7 May 1928, and Couzinet 30. The Couzinet 70 was developed originally as a mail plane for use of Aéropostale's South Atlantic service. The aircraft was a low-wing monoplane with a fixed tailwheel landing gear. The aircraft was powered by three Hispano-Suiza 12Nb inline piston engines. The two wing mounted engines could be accessed in flight through tunnels in the wing. After route-proving in 1933 the aircraft was modified and re-designated the Couzinet 71 and entered service with Aéropostale in May 1934.

The Couzinet 70 Arc-en-Ciel at Fernando de Noronha, Brazil on 14 June 1934.

Variants[edit]

10 Arc en Ciel
The original prototype four place bomber, later converted to the Couzinet 27
27 Arc en Ciel II
Converted from the Couzinet 10 but crashing on 8 August 1928
70 Arc en Ciel III
Three-engined Hispano-Suiza 12Nb powered prototype, one built and converted to a Couzinet 71
71
Prototype modified for service as a mailplane, with lengthened nose and strut-braced tailplane.[1]

Operators[edit]

 France
 Spain

Specifications (70/71)[edit]

General characteristics

  • Crew: Four
  • Length: 16.15 m (52 ft 11¾ in)
  • Wingspan: 30 m (98 ft 5 in)
  • Height: 4 m (13 ft 1½ in)
  • Wing area: 90 m2 (968.78 ft2)
  • Empty weight: 7310 kg (16,116 lb)
  • Gross weight: 16,790 kg (37,015 lb)
  • Powerplant: 3 × Hispano-Suiza 12Nb V-12 liquid-cooled piston engine, 485 kW (650 hp) each

Performance

  • Maximum speed: 280 km/h (174 mph)
  • Range: 6800 km (4225 miles)

References[edit]

  1. ^ Bernard, Martin; Sparrow, Dave; Espérou, Bernard (December 2014). "F-1922 - The French Civil Register from 1922". Air Britain Archive: 2014/170. 
  • The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing. 

External links[edit]