Häfeli DH-1
| Häfeli DH-1 | |
|---|---|
 Replica of the Häfeli DH-1 |
|
| Type: | Reconnaissance plane |
| Design country: | |
| Manufacturer: | |
| First flight: |
1916 |
| Number of pieces: |
6th |
The Häfeli DH-1 , different spelling Haefeli DH-1 , was a military plane in biplane design of the Swiss designer August Haefeli .
history
The Federal Konstruktionswerkstätte (K + F) founded in 1915 a separate department for aircraft flight with a plant in Thun . August Haefeli, who had previously worked at Farman and, in Germany, at Aerowerke Gustav Otto, was hired as chief engineer . There he constructed the reconnaissance aircraft AGO CI and C.II , which had double tail girders as a special constructive design feature.
After returning to Switzerland, he began working on the DH-1, which was conceptually based on the three-legged, wooden AGO C types. The DH-1 also had a fuselage nacelle with a pusher propeller and double tail booms. The machine had a four-wheel chassis with a tail spur under the two booms. The crew sat on tandem seats in the fuselage nacelle, with the observer with an Mg 11 machine gun (caliber 7.5 mm) in front of the pilot. The 120 hp six-cylinder in-line engine Argus As II from Argus Motoren Gesellschaft used as the drive was manufactured under license by the Bühler brothers AG in Uzwil .
Six machines of the DH-1 were built at the Swiss Federal Construction Workshop in Thun, which were used by the Swiss Air Force as reconnaissance aircraft from 1916 to 1919 , but hardly played a role. The planes were actually only prototypes and differ from each other accordingly. In addition, three aircraft were destroyed in accidents within a year. Since the performance and flight characteristics of the machine were also unsatisfactory, the remaining ones were retired and scrapped in 1919. A replica was completed in around 9,700 working hours by retired employees of the operational groups of the Federal Office for Military Airfields and is located in the Flieger-Flab-Museum in Dübendorf.
Technical specifications
| Parameter | Data |
|---|---|
| crew | 2 |
| length | 8.82 m |
| span | 12.80 m |
| height | 3.00 m |
| Wing area | 38.00 m² |
| Empty mass | 750 kg |
| Max. Takeoff mass | 1125 kg |
| Top speed | 126 km / h |
| Service ceiling | 3000 m |
| Range | 250 km |
| Engines | an Argus As II with 120 hp |
literature
- The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing, London 1981, OCLC 16544050
- Airplanes from A – Z. In: AERO - The illustrated compilation of aviation. No. 89, p. 2486. Cavendish, OCLC 637572384
Web links
- Description of the aircraft on old.hermannkeist.ch (accessed October 29, 2013)
Individual evidence
- ↑ Hans Giger: Report on the activities of the senior groups Buochs and Interlaken from mid-1979 to the end of 1998 ( Memento from July 10, 2019 in the Internet Archive )