| Häfeli DH-4 | |
|---|---|
| Role | fighterType of aircraft |
| 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
Data from The Complete Book of Fighters
General characteristics
- Crew: 1
- Length: 6 m (19 ft 8 in)
- Wingspan: 9.8 m (32 ft 2 in)
- Height: 2.6 m (8 ft 6 in)
- Wing area: 22 m (240 sq ft)
- Empty weight: 640 kg (1,411 lb)
- Gross weight: 885 kg (1,951 lb)
- Powerplant: 1 × Hispano-Suiza HS-41 V-8 water-cooled piston engine, 112 kW (150 hp)
- Propellers: 2-bladed fixed-pitch propeller
Performance
- Maximum speed: 148 km/h (92 mph, 80 kn)
- Range: 300 km (190 mi, 160 nmi)
- Endurance: 4 hours 30 minutes
- Rate of climb: 4.5 m/s (890 ft/min)
- Time to altitude: 1,829 m (6,000 ft) in 14 minutes
Armament
- Guns: 1 x synchronised machine gun
References
- Green, William; Swanborough, Gordon (1994). The Complete Book of Fighters. London: Salamander. p. 272. ISBN 1-85833-777-1.
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