McCulloch H-30

__NOTOC__ Infobox Aircraft
name=McCulloch YH-30


caption=
type=Light helicopter
manufacturer=McCulloch Motors Corporation
designer=Drago Jovanovich
first flight=1951
introduced=
retired=
status=
primary user=United States Army
more users=
produced=
number built=3
variants with their own articles=

The McCulloch Model MC-4C was a American tandem-rotor helicopter and was the first helicopter developed by McCulloch Motors's Aircraft Division. Harding, Stephen "U.S. Army Aircraft Since 1947", Airlife Publishing, Ltd. 1990. ISBN 1-85310-102-8] It was evaluated by the United States Army as the YH-30.

Design and development

The MC-4C was a larger version of the earler Jovanovich JOV-3 tandem-rotor helicopter and was developed by the McCulloch Motors Corporation. The JOV-3 was developed by Jovanovich when he headed the Helicopter Engineering and Research Corporation. The JOV-3 first flew in 1948. In 1949 Jovanovich moved to the McCulloch Motors Corporation where an enlarged helicopter the MC-4 first flew in March 1951. It was followed by a similar MC-4C and three evaluation helicopters for the United States Army (as the YH-30). The MC-4C was slightly larger than the MC-4. When the MC-4C was certified in 1953 it was the first tandem-rotor helicopter to be certfied in the United States for commercial use. Three examples were evaluated by the United States Army as the YH-30, but Army's evaluation showed the helicopter to be underpowered..

The YH-30 had a steel-tube framework with a light metal skin, A single 200hp Franklin piston engine was horizontally mounted amidships and powered two intermeshing tandem rotors. It had a fixed wheeled tricycle landing gear.

No civil or military orders were received and Jovanovich formed his own company, the Jovair Corporation where he modified the MC-4C as a prototype for a four-seat private helicopter designated the Sedan 4E. The Sedan 4E was powered by 210hp Franklin 6A-335 engine. A version with a tubo-charged engine was designed as the Sedan 4ES and a more basic Sedan 4A for agricultural use.. By 1965 a small number of Sedan helicopters were built. In the early 1970s McCulloch regained the rights to the helicopter designs.

Variants

;McCulloch MC-4:Prototype with a 165hp Franklin engine, one built.;McCulloch MC-4C:Protoype with a 200hp Franklin engine, one built.;YH-30:Military version of the MC-4C, three built.;Jovair Sedan 4E:Production civil four-seat version powered by a 210hp Franklin 6A-335 engine.;Jovair Sedan 4ES:Sedan with a turbo-charged 225hp Franklin engine.;Jovair Sedan 4A:Simplified agricultural version.

Operators

;USA
*United States Army

urvivors

In 2008 two MC-4Cs are still registered in the United States.

pecification (YH-30)

aerospecs
ref=
met or eng?= eng

crew=2
capacity=
length m=
length ft=32
length in=0
span m=
span ft=
span in=
swept m=
swept ft=
swept in=
rot number= 2
rot dia m=
rot dia ft= 22
rot dia in= 0
dia m=
dia ft=
dia in=
width m=
width ft=
width in=
height m=
height ft=9
height in=2
wing area sqm=
wing area sqft=
swept area sqm=
swept area sqft=
rot area sqm=
rot area sqft=
volume m3=
volume ft3=
aspect ratio=
empty weight kg=
empty weight lb=1200
gross weight kg=
gross weight lb=2000
lift kg=
lift lb=

eng1 number=1
eng1 type=Franklin O-335-6 (6A4-200-C6) piston
eng1 kw=
eng1 hp= 200
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=
max speed mph=105
max speed mach=
cruise speed kmh=
cruise speed mph=
range km=
range miles=200
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=

References

* John Andrade, U.S.Military Aircraft Designations and Serials since 1909, Midland Counties Publications, 1979, ISBN 0 904597 22 9 (Page 121)
* The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985), 1985, Orbis Publishing, Page 2213/2214.

External links

* [http://www.rotors.org/jovair/history.htm Jovair history]