Puneet Varma (Editor)

SNCASE SE 400

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Wingspan
  
19 m

Manufacturer
  
SNCASE

Length
  
14 m

The SNCASE SE-400 was a prototype French twin-engined coastal patrol floatplane of the Second World War. A single example was flown, but development was abandoned in May 1940 owing to the German invasion of France.

Contents

Design and development

In 1937 the French Air Ministry issued specification A46 for a three-seat coastal reconnaissance seaplane to replace the obsolete CAMS 37 biplane flying boats of the French Navy. To meet this requirement, the 'Société Nationale des Constructions Aéronautiques du Sud-Est (SNCASE) designed a twin engined monoplane floatplane, the SE-400, work beginning on construction of two prototypes in March 1938.

The SE.400 was of mixed construction, with a steel tube fuselage and wooden wings. It had a twin tail and was powered by two 655 hp (489 kW) Gnome-Rhône 14M radial engines. The aircraft's undercarriage consisted of two light alloy floats mounted beneath the engines.

Operational history

The first prototype, the SE.400-01 made its maiden flight from Marignane on 31 December 1939. Flight testing showed that the SE-400 suffered from stability problems, and the aircraft had a new, larger, tail assembly fitted and its nose lengthened. These modifications resolved the aircraft's handling problems, but by this time the competing Breguet Nautilus had been ordered into production.

The war situation and the continuing delays in the program resulted in the development of the SE-400 being abandoned on 24 May 1940, with the second prototype, a landplane powered by two 500 hp (373 kW) Lorraine 9N Algol engines, left incomplete.

Operators

 France
  • French Navy

    • Specifications

    Data from War Planes of the Second World War

    General characteristics

  • Crew: 3
  • Length: 13.50 m (44 ft 3 in)
  • Wingspan: 19.35 m (63 ft 6 in)
  • Height: 4.50 m (14 ft 9 in)
  • Wing area: 52.00 m2 (559.7 sq ft)
  • Gross weight: 5,500 kg (12,125 lb)
  • Powerplant: 2 × Gnome-Rhône 14M 8/9 14-cylinder air-cooled radial engines, 488 kW (655 hp) each

    • Performance

  • Maximum speed: 290 km/h; 156 kn (180 mph) at 2,000 m (6,560 ft)
  • Cruise speed: 159 km/h; 86 kn (99 mph) (econ cruise)
  • Range: 958 km; 517 nmi (595 mi) at 159 km/h (99 mph)
  • Endurance: 6 hr
  • Service ceiling: 4,000 m (13,120 ft)

    • Armament

  • Guns: 1× 7.5 mm Darne machine gun at dorsal position
  • Bombs: 2× 75 kg (165 lb) bombs and 2× flares

    • References

    SNCASE SE-400 Wikipedia
    (Text) CC BY-SA