McDonnell XHCH

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

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

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)

3-view line drawing of the McDonnell XHCH-1
3-view line drawing of the McDonnell XHCH-1

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

  1. ^ a b Francillon, Rene (1990). McDonnell Douglas aircraft since 1920. Volume II (2nd ed.). Putnam Aeronautical. ISBN 978-0-85177-828-0.

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