Code One Magazine: The X Planes, X-18

X-18
Mission: The X-18 was designed and built to study the feasibility of a transport capable of an operational tilt-wing vertical takeoff and landing. It was powered by two Allison T40-A-14 turboprop engines equipped with contra-rotating propeller assemblies.

Manufacturer: Hiller Aircraft Corporation
Number Built: 1
Sponsor: USAF, USN
Fastest Flight: 253 mph
Highest Flight: 35,300 feet
First Flight: 20 November 1959
Last Flight: 4 November 1960
Total Flights: 20
Length: 63 feet 0 inches
Wingspan: 48 feet 0 inches
Height: 24 feet 7 inches
Gross Weight: 33,000 lb

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