Helio Stallion

Helio Stallion

__NOTOC__ Infobox Aircraft
name=H-550 Stallion


caption=
type=Civil utility aircraft
national origin=United States
manufacturer=Helio
designer=
first flight=5 June avyear|1964
introduced=
retired=
status=
primary user=USAF/CIA
more users=
produced=
number built=20
variants with their own articles=
The Helio H-550 Stallion was an STOL utility aircraft developed in the United States in the 1960s. Initially conceived as a turboprop-powered variant of the Helio Courier, it eventually emerged as a completely new design of the same general configuration. It was a much larger aircraft than the Courier, and Helio soon discovered that it was too expensive for the market.

The USAF. however, emerged as a buyer for the design, purchasing the aircraft for the Credible Chase programme as the AU-24A. This was the gunship version of the Stallion, with a PT6A-27 680 shp turboprop, equipped with a General Electric XM-197 three-barrel 20 mm Gatling gun was mounted in the left cargo door. It also had five underwing and fuselage hardpoints. Of the 17 aircraft purchased, fourteen or fifteen were eventually sold to the Cambodian (Khmer) Air Force.

Variants

* H-550 - prototypes (2 built)
** H-550A - production version (18 built)
* H-634 Twin Stallion - version with twin Allison 250 turboprops mounted on a beam across the nose of the aircraft (not built)
* H-1201T Twin Stallion - version with twin engines in underwing nacelles, retractable undercarriage, tiptanks, and underwing cargo pods (not built)

pecifications (H-550A)

aerospecs
ref=
met or eng?= eng

crew=One pilot
capacity=10 passengers
length m=12.07
length ft=39
length in=7
span m=12.50
span ft=41
span in=0
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=2.81
height ft=9
height in=3
wing area sqm=22.5
wing area sqft=242
swept area sqm=
swept area sqft=
rot area sqm=
rot area sqft=
volume m3=
volume ft3=
aspect ratio=
empty weight kg=1,281
empty weight lb=2,825
gross weight kg=2,313
gross weight lb=5,100
lift kg=
lift lb=

eng1 number=1
eng1 type=Pratt & Whitney Canada PT6A-27
eng1 kw= 507
eng1 hp= 680
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=

max speed kmh=364
max speed mph=226
max speed mach=
cruise speed kmh=
cruise speed mph=
range km=1,755
range miles=1,090
endurance h=
endurance min=
ceiling m=
ceiling ft=
glide ratio=
climb rate ms=
climb rate ftmin=
sink rate ms=
sink rate ftmin=

armament1=
armament2=
armament3=
armament4=
armament5=
armament6=
aircontent
see also=
related=
similar aircraft=
lists=

References

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