Hughes XV-9

Infobox Aircraft
name= XV-9


caption= The sole XV-9A departs Hughes Field on one of its first test flights
type= Experimental helicopter
manufacturer= Hughes Helicopters
designer=
first flight= 1964
introduced=
retired=
status=
primary user=
more users=
produced=
number built= 1
variants with their own articles=

The Hughes XV-9 (company designation Hughes Model 385) was a 1960s American high-speed research helicopter built by Hughes Helicopters .

Design and development

The Model 385 was designed and built under a United States Army research contract to prove a concept known as hot-cycle propulsion. The helicopter was given the military designation XV-9A with the serial number "64-15107". Two General Electric YT64-GE-6 turbojets were used as gas generators, the jet efflux was ducted to nozzles at the blade tips. The rotor blades also had cooling ducts in both the leading and trailing edges. To keep costs to a minimum the cockpit with two side-by-side seats of an OH-6A was used and the landing gear was from a Sikorksy H-34.

Operational service

The helicopter first flew on the 5 November 1964. After test flight at Hughes facility at Culver City the XV-9A was transferred to Edwards Air Force Base for further tests. The tests were satisfactory and the company were confident that the hot-cycle system would be widely used, although the XV-9A was noisy and had a high fuel consumption. The company was unable to mitigate the problems and the development by Hughes of pressure-jet systems was not proceeded with. The Army tests were completed in August 1965 and the helicopter was returned to Hughes.

Variants

;XV-9A:United States military designation for the Hughes Model 385, one built.

pecifications (XV-9A)

aerospecs
met or eng?= met

crew=Two
capacity=
length m=13.72
length ft=
length in=
span m=
span ft=
span in=
swept m=
swept ft=
swept in=
rot number= 1
rot dia m= 16.76
rot dia ft=
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dia m=
dia ft=
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width m=
width ft=
width in=
height m=3.66
height ft=
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wing area sqm=
wing area sqft=
swept area sqm=
swept area sqft=
rot area sqm=
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volume m3=
volume ft3=
aspect ratio=
empty weight kg=3856
empty weight lb=
gross weight kg=11567
gross weight lb=
lift kg=
lift lb=

eng1 number=2
eng1 type=General Electric YT-64-GE-6 gas turbine
eng1 kw=
eng1 hp=
eng1 kn=
eng1 lbf=
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eng1 lbf-ab=
eng2 number=
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max speed kmh=222
max speed mph=
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cruise speed mph=
range km=240
range miles=
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endurance min=
ceiling m=
ceiling ft=
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climb rate ftmin=
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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

* [http://avia.russian.ee/helicopters_eng/mcdonnel_hot.php]

ee also

aircontent

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