Hiller X-18

Hiller X-18

was an experimental cargo transport aircraft designed to be the first testbed for tiltwing and VSTOL (vertical/short takeoff and landing) technology.

Role : Experimental prototype
Manufacturer : Hiller Aircraft Corporation
Designed by : Stanley Hiller Jr
First flight : 24 November 1959
Status : Aircraft scrapped 1964
Number built : 1
Developed from : Chase YC-122 Avitruc

Hiller X-18 Specifications

General characteristics

  • Crew: 2-3
  • Length: 63 ft 0 in (19.2 m)
  • Wingspan: 48 ft 0 in (14.6 m)
  • Height: 24 ft 7 in (7.5 m)
  • Empty weight: 26,786 lb (12,150 kg)
  • Max takeoff weight: 33,000 lb (14,850 kg)
  • Powerplant:
    • 1× Westinghouse J34 turbojet engine for pitch control, 3,400 lbf (15.2 kN)
    • 2× Allison T40-A-14 turboprop engines, 5,500 hp (4,100 kW) each

Performance

  • Maximum speed: 253 mph (407 km/h)
  • Service ceiling: 35,300 ft (10,800 m)
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