Ellehammer helicopter

Ellehammer helicopter

__NOTOC__ Infobox Aircraft
name="Helicopter"


caption=
type=Experimental helicopter
manufacturer=Jacob Ellehammer
designer=Jacob Ellehammer
first flight=28 September 1912
introduced=
retired=
status=
primary user=
more users=
produced=
number built=1
variants with their own articles=
The Ellehammer helicopter was an otherwise-unnamed experimental aircraft built in Denmark in 1912. Based on experiments with models, Jacob Ellehammer constructed a full-size machine equipped with two contra-rotating discs, each of which was fitted with six vanes around its circumference. The pitch of these vanes could be varied in operation by the pilot, an early example of cyclic control. The same engine that drove the rotors also powered a propeller mounted tractor-wise to the aircraft's frame.

After a number of indoor tests, the aircraft was demonstrated outdoors and made a number of free take-offs. One of these trials was witnessed by Prince Axel of Denmark. Experiments with the helicopter continued until September 1916, when it tipped over during take-off, destroying its rotors.

pecifications

aerospecs
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crew=One pilot
capacity=
length m=
length ft=
length in=
span m=
span ft=
span in=
swept m=
swept ft=
swept in=
rot number= 2
rot dia m= 7.47
rot dia ft= 24
rot dia in= 7
dia m=
dia ft=
dia in=
width m=
width ft=
width in=
height m=
height ft=
height in=
wing area sqm=
wing area sqft=
swept area sqm=
swept area sqft=
rot area sqm= 12.0
rot area sqft= 130
volume m3=
volume ft3=
aspect ratio=
empty weight kg=
empty weight lb=
gross weight kg=
gross weight lb=
lift kg=
lift lb=

eng1 number=1
eng1 type=Custom-built radial engine
eng1 kw= 27
eng1 hp= 36
eng1 kn=
eng1 lbf=
eng1 kn-ab=
eng1 lbf-ab=
eng2 number=
eng2 type=
eng2 kw=
eng2 hp=
eng2 kn=
eng2 lbf=
eng2 kn-ab=
eng2 lbf-ab=

perfhide=Y
max speed kmh=
max speed mph=
max speed mach=
cruise speed kmh=
cruise speed mph=
range km=
range miles=
endurance h=
endurance min=
ceiling m=
ceiling ft=
glide ratio=
climb rate ms=
climb rate ftmin=
sink rate ms=
sink rate ftmin=

armament1=
armament2=
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armament6=

aircontent
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References

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