avia.wikisort.org - Helicopter

The McDonnell XHCH (Model 86) was a 1950s aerial crane helicopter proposal for the United States Navy by the McDonnell Corporation.

XHCH
Role	Aerial crane helicopter Type of aircraft
National origin	United States
Manufacturer	McDonnell Aircraft
Status	Cancelled; mockup phase only
Primary user	United States Navy

Development

The XHCH was developed in the early 1950s to meet a US Navy requirement for a helicopter capable of carrying supplies and ammunition between ships and carrying heavy loads for short distances from ship-to-shore or from marshalling areas ashore to front-line units. Three prototypes (BuNos 138654/138656) were ordered, and a full-size mockup was inspected in May 1953. However, budget cuts forced the Navy to cancel the XHCH-1 project on January 18, 1959, without a prototype being built.[1]

Specifications (XHCH estimated)

Data from McDonnell Douglas aircraft since 1920. Volume II[1]

General characteristics

• Crew: two
• Capacity: 30 troops or 24 stretchers
• Length: 37 ft 7 in (11.45 m)
• Height: 16 ft 8 in (5.07 m)
• Empty weight: 14,879 lb (6,749 kg)
• Gross weight: 35,331 lb (16,026 kg)
• Max takeoff weight: 42,000 lb (19,051 kg)
• Powerplant: 2 × Allison T56 gas turbine compressed air generator engines, 3,750 shp (2,800 kW) each
• Powerplant: 3 × McDonnell 12JP20 cold pressure jets, 1,600 lbf (7.1 kN) thrust each
• Main rotor diameter: 65 ft (20 m)
• Main rotor area: 3,320 sq ft (308 m²)

Performance

• Maximum speed: 115 mph (185 km/h, 100 kn) at sea level
• Combat range: 23 mi (37 km, 20 nmi)
• Service ceiling: 7,497 ft (2,285 m) hover ceiling out of ground effect
• Rate of climb: 3,100 ft/min (16 m/s)

References

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