Breguet Nautilus

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The Breguet 790 Nautilus was a prototype French three-seat coastal patrol flying-boat designed and built by Breguet Aviation to meet a requirement from the French navy.^[1]

Development

The Nautilus had a high-set monoplane wing on a single-step hull, the wing was fabric covered and the hull all-metal.^[1] The aircraft was powered by a 720 hp (537 kW) Hispano-Suiza 12Xirs V-12 piston engine strut mounted above the hull driving a pusher propeller.^[1]

The first of two prototypes flew in 1939 and performed well enough that a production order for 75 was placed.^[1] The order was reduced to 45 in May 1940 in order to free production capacity for more urgently needed combat aircraft, but none were built following the German invasion.^[1]^[2]

Variants

Breguet 790: Basic three-seat coastal reconnaissance aircraft, powered by 540 kW (720 hp) Hispano-Suiza 12Xirs engine. Two prototypes built.^[3]
Breguet 791: Proposed version powered by single 490 kW (660 hp) Gnome-Rhône 14M radial engine. Unbuilt.^[2]
Breguet 792: Proposed version for ship-based reconnaissance aircraft, powered by two 270 kW (360 hp) Béarn 6 air cooled inline engines. Unbuilt.^[2]

Specifications

Data from ^[1]

General characteristics

Crew: 3
Length: 13.00 m (42 ft 8 in)
Wingspan: 17.00 m (55 ft 9 in)
Height: 4.00 m (13 ft 1 in)
Wing area: 33.00 m² (355.2 sq ft)
Empty weight: 2,700 kg (5,952 lb)
Max takeoff weight: 3,600 kg (7,937 lb)
Powerplant: 1 × Hispano-Suiza 12Xirs inline piston engine, 540 kW (720 hp)
Propellers: 3-bladed

Performance

Maximum speed: 310 km/h (193 mph; 167 kn)
Cruising speed: 150 km/h (93 mph; 81 kn)
Range: 900 km (559 mi; 486 nmi)
Service ceiling: 6,000 m (19,685 ft)

References

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Notes

↑ 1.0 1.1 1.2 1.3 1.4 1.5 Orbis 1985, p. 879
↑ 2.0 2.1 2.2 Green 1968, p.14.
↑ Green 1968, pp. 13–14.

Bibliography

Green, William (1968). War Planes of the Second World War: Volume Five Flying Boats. London: Macdonald. ISBN 0-356-01449-5.
The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing.

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Breguet Nautilus

Development

Variants

Specifications

See also

References