Häfeli DH-5

infobox Aircraft
name = DH-5
type = Reconnaissance biplane
manufacturer = K + W



caption = Häfeli DH-5, second series.
designer = August Häfeli
first flight = 1919
introduced = 1922
retired = 1940
status =
primary user = Swiss Air Force
more users =
produced =
number built = 80
unit cost =
developed from =
variants with their own articles = The Häfeli DH-5 was a 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

The Häfeli DH-5 was a two-seat reconnaissance aircraft designed by August Häfeli. It was a single-bay biplane of wood and fabric construction. The aircraft was powered by a 180 hp (134 kW) LFW I engine produced by the Swiss Locomotive and Machine Works. Test flying of the prototype commenced in March 1919 and 39 were ordered. Some aircraft were later modified with Handley Page slats. A second batch of 20 aircraft were powered by a 200 hp (149 kW) LFW II engine. A further batch of 20 aircraft designated the DH-5A used the LFW III engine.

Operational history

The DH-5 entered service in 1922 and were not withdrawn from service until 1940.

Variants

;DH-5:Initial production version with either the LFW I or LFW II engine.;DH-5A:Version with a 220 hp (164 kw) LFW III engines, survivors were modified at Thun in 1932 with Handley Page slats and changes to allow crew to wear parachutes.;DH-5X:Trials aircraft powered by a Hispano-Suiza HS-42 8Fb engine imported from France. The aircraft was not ordered into production due lack of availability of the engines, the DH-5X crashed in 1933.

Operators

;SUI

pecifications (DH-5A)

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= 24 ft 11¼ in
length alt= 7.60 m
span main= 39 ft 4½ in
span alt= 12 m
height main= 10 ft 2 in
height alt= 3.10 m
area main= 338 ft²
area alt= 31.40 m²
airfoil=
empty weight main= 1,894 lb
empty weight alt= 859 kg
loaded weight main=
loaded weight alt=
useful load main=
useful load alt=
max takeoff weight main= 2,802 lb
max takeoff weight alt= 1271 kg
more general=

engine (prop)=LFW III
type of prop=vee piston engine
number of props=1
power main= 220 hp
power alt= 164 kW
power original=
max speed main= 112 mph
max speed alt= 180 km/h
cruise speed main=
cruise speed alt=
never exceed speed main=
never exceed speed alt=
stall speed main=
stall speed alt=
range main= 298 miles
range alt= 480 km
ceiling main= 18,375 ft
ceiling alt= 5600 m
climb rate main=
climb rate alt=
loading main=
loading alt=
thrust/weight=
power/mass main=
power/mass alt=
more performance=

armament=
* one fixed forward-facing machine-gun
* one pivoted machine-gin in the rear cockpit

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=