Heinkel HD 24

__NOTOC__ Infobox Aircraft
name=HD 24


caption=
type=Training seaplane
national origin=Germany
manufacturer=Heinkel, Svenska Aero
designer=
first flight=avyear|1926
introduced=
retired=
status=
primary user=DVS
more users="Flygvapnet"
produced=
number built=35
variants with their own articles=The Heinkel HD 24 was a training seaplane developed in Germany in the late 1920s. It was a conventional single-bay biplane with equal-span, unstaggered wings. The fuselage was braced to both the upper and lower wings with a number of struts on its sides, in addition to the normal cabane struts. The pilot and instructor sat in tandem, open cockpits, and the undercarriage consisted of twin pontoons, although this could be readily exchanged for wheels or skis.

Heinkel entered two HD 24s in the Seeflugwettbewerb seaplane competition in 1926, leading to orders by the DVS (23 aircraft) and the Swedish Navy. The latter aircraft were to be built in Sweden by Svenska Aero based on two pattern aircraft provided by Heinkel. Before the Swedish examples could be delivered, the "Flygvapnet" had assumed responsibility for Swedish naval aviation, and so took delivery of the six domestically-produced machines, designating them Sk 4.

One HD 24 was exported to China, and another was bought by German explorer Gunther Plüschow who named it "Tsingtau" and took it on an expedition in 1927-28 to Patagonia and Tierra del Fuego. The journey was recorded in his book and documentary film "Silberkondor über Feuerland".

Variants

* Sk 4 - HD 24 for Swedish service with Mercedes D.IIIa engine (2 built by Heinkel, 4 by Svenska Aero)
** Sk 4A - Sk 4 with Junkers L 5 engine (2 built by Svenska Aero, plus 3 converted from Sk 4)
** Sk 4B - Sk 4 with Armstrong Siddeley Puma engine (3 converted from Sk 4)

pecifications (HD 24a)

aerospecs
ref=
met or eng?= met

crew=Two, pilot and instructor
capacity=
length m=8.60
length ft=28
length in=3
span m=14.20
span ft=46
span in=7
swept m=
swept ft=
swept in=
rot number=
rot dia m=
rot dia ft=
rot dia in=
dia m=
dia ft=
dia in=
width m=
width ft=
width in=
height m=3.84
height ft=12
height in=7
wing area sqm=50.1
wing area sqft=539
swept area sqm=
swept area sqft=
rot area sqm=
rot area sqft=
volume m3=
volume ft3=
aspect ratio=
empty weight kg=1,300
empty weight lb=2,870
gross weight kg=2,150
gross weight lb=4,740
lift kg=
lift lb=

eng1 number=1
eng1 type=BMW IV
eng1 kw= 240
eng1 hp= 320
eng1 kn=
eng1 lbf=
eng1 kn-ab=
eng1 lbf-ab=
eng2 number=
eng2 type=
eng2 kw=
eng2 hp=
eng2 kn=
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max speed kmh=180
max speed mph=113
max speed mach=
cruise speed kmh=
cruise speed mph=
range km=
range miles=
endurance h=
endurance min=
ceiling m=4,500
ceiling ft=14,800
glide ratio=
climb rate ms=4.3
climb rate ftmin=850
sink rate ms=
sink rate ftmin=

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armament6= aircontent
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References

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