|Role||Long-range commercial monoplane|
|Manufacturer||Société des Avions René Couzinet|
|First flight||11 February 1932|
Design and developments
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.
- 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
- Prototype modified for service as a mailplane, with lengthened nose and strut-braced tailplane.
- Spanish Republican Air Force - Couzinet 101
- 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
- Maximum speed: 280 km/h (174 mph)
- Range: 6800 km (4225 miles)
- 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.
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