Häfeli DH-4
| Häfeli DH-4 | |
|---|---|
| Role | fighter |
| Manufacturer | K+W |
| Designer | August Häfeli |
| First flight | early 1918 |
| Primary user | Swiss Air Force |
| Number built | 1 |
The Häfeli DH-4 was a Swiss fighter prototype in the late 1910s, build by the Eidgenoessische Konstruktionswerkstaette. The DH-4 was a single-seat fighter based on the successful Häfeli DH-3 design. It was made of wood with fabric covering, and carried one machine gun.
Operational history
The Swiss Air Force trialled it from May 1918 to August 1918, but the DH-4 was found to possess disappointing performance and poor handling. As such only one was ever produced and production ceased in late 1918.
List of operators
Specifications
General characteristics
- Crew: Two
- Length: 6.00m (19 ft 8¼ in)
- Wingspan: 9.80 m (32 ft 2 in)
- Height: 2.60 m (8 ft 6⅓ in)
- Wing area: 22.00m² (236.8 ft²)
- Empty weight: 640 kg (1,410 lb)
- Loaded weight: 885 kg (1,951 lb)
- Powerplant: 1 × Hispano-Suiza HS-41 eight-cylinder water-cooled engine, 112 kW (150 hp)
Performance
- Maximum speed: 148 km/h (92 mph)
- Range: 300 km (186 miles)
- Rate of climb: 4.5m/s (886 ft/min)
- Time to 6,000 ft: 14 minutes
- Endurance: 4.5 hours
Armament
- Guns: 1 x synchronised machine gun
Bibliography
- William Green and Gordon Swanborough. The Complete Book of Fighters. Colour Library Direct, Godalming, UK: 1994. ISBN 1-85833-777-1.
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