Heinkel He 57

Heinkel HE 57 Heron
Front view of Heinkel HE 57 at Stockholm International Aero Show 1931
Role	Amphibious flying boat
National origin	Germany
Manufacturer	Heinkel
Designer	Dr Ernst Heinkel
First flight	1929-30
Introduction	1930 Paris Aero Show
Number built	1

The Heinkel HE 57 was a single engine amphibious flying boat built in 1929.

Development

The sole HE 57 was built by the Ernst-Heinkel-Flugzeugwerken at Warnemunde in 1929. ^[1] It was displayed at the Paris Aero Show in December 1930 and at the Stockholm International Aero Show in May 1931. ^[2] It was purchased by the flying school at List auf Sylt who used it as a trainer. ^[1]

Design

The double stepped hull was made of aluminum. The wings used wood spars and aluminum ribs with fabric covering. The landing gear was hydraulically raised with a manual pump. ^[2]

Specifications Heinkel HE 57

HE 57

Data fromFlight ^[2] unless noted

General characteristics

• Capacity: 6
• Length: 11.8 m (38 ft 9 in) ^[1]
• Wingspan: 16.00 m (52 ft 6 in)
• Wing area: 39.2 m² (422 sq ft)
• Gross weight: 2,440 kg (5,380 lb)
• Powerplant: 1 × Pratt and Whitney Wasp Radial, 340 kW (450 hp)
• Propellers: 2-bladed

Performance

• Maximum speed: 195 km/h (121 mph, 105 kn)
• Service ceiling: 3,800 m (12,500 ft) ^[1]
• Time to altitude: 5 min to 1,000 m (3,300 ft)
• Wing loading: 62.3 kg/m² (12.75 lb/sq ft)
• Landing speed: 93 km/h (58 mph; 50 kn)

References

1. Gütschow, Fred (1978). Die deutschen Flugboote. Stuttgart: Motorbuch Verlag. pp. 204–6. ISBN   3-87943-565-0.
2. "I.L.I.S. The Stockholm International Aero Show". Flight . XXIII (22): 472–4. 29 May 1931. Archived from the original on 12 March 2009.