Häfeli DH-1

infobox Aircraft
name = DH-1
type = Reconnaissance biplane
manufacturer = K+W



caption =
designer = August Häfeli
first flight = 1916
introduced = 1916
retired = 1919
status =
primary user = Swiss Air Force
more users =
produced =
number built = 6
unit cost =
developed from =
variants with their own articles = The Häfeli DH-1 was an 1910s Swiss two-seat reconnaissance aircraft, built by the aircraft department of the Federal Construction Works ("Eidgenössische Konstruktions-Werkstätte", K+W) at Thun, Switzerland.

Development and design

In 1915 K + W set up their aircraft department and employed August Häfeli as chief engineer. Häfeli had previously designed the AGO C.I and AGO C.II, German reconnaissance biplanes. His first design was the Häfeli DH-1, similar in concept to his designs for AGO Flugzeugwerke. The DH-1 was a three-bay biplane of wood and fabric construction, it had a fuselage pod with tandem seating for the two-man crew and twin booms mounting the tail. The DH-1 was powered by an Argus As II engine built under licence by Buhler Brothers Limited. Six aircraft built.

Operational history

Six DH-1s were built during 1916 but within a year three had been destroyed in accidents. The survivors were withdrawn from service in 1919 and scrapped.

Operators

;SUI

pecifications (DH-1)

aircraft specifications

plane or copter?=plane
jet or prop?=prop

ref=The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985)

crew=Two
capacity=
length main= 28 ft 11¼in
length alt= 8.82 m
span main= 42 ft 0 in
span alt= 12.80 m
height main= 9 ft 10 in
height alt= 3 m
area main= 409.04 ft²
area alt= 38 m²
airfoil=
empty weight main= 1,653 lb
empty weight alt= 750 kg
loaded weight main=
loaded weight alt=
useful load main=
useful load alt=
max takeoff weight main= 2,480 lb
max takeoff weight alt= 1125 kg
more general=

engine (prop)=Argus As II
type of prop=inline piston
number of props=1
power main= 120 hp
power alt= 89 kW
power original=
max speed main= 78mph
max speed alt= 126 km/h
cruise speed main=
cruise speed alt=
never exceed speed main=
never exceed speed alt=
stall speed main=
stall speed alt=
range main= 155 miles
range alt= 250 km
ceiling main= 9,840 ft
ceiling alt=3000 m
climb rate main=
climb rate alt=
loading main=
loading alt=
thrust/weight=
power/mass main=
power/mass alt=
more performance=

armament=
* one 0.293 in (7.45 mm) machine-gun

avionics=

References

*cite book |last= |first= |authorlink= |coauthors= |title= The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985)|year= |publisher= Orbis Publishing|location= |issn=

External links

ee also

aircontent

related=

similar aircraft=

sequence= DH-1 • DH-2 • DH-3 • DH-5
lists=

see also=