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Ryan XV-8

The Ryan XV-8 Flexible Wing Aerial Utility Vehicle (nicknamed Fleep, short for “Flying Jeep”) was an improved version of the Flex-Wing.

Both aircraft were built by Ryan Aeronautical Company in collaboration with NASA for the United States Air Force and the United States Army and tested in 1961 as a STOL patrol, reconnaissance, and light utility aircraft to transport people or freight when a more specialized aircraft is not required or available.

The Fleep began as the Flex-Wing.

The Flex-Wing had four-wheel landing gear, a smaller nose section behind which the pilot sat, and a single vertical tail/rudder.

The Fleep had tricycle landing gear, a larger nose section and a V tail/rudder.

The wing was a fabric delta-shaped Rogallo wing with a foldable frame; the wing was attached to a pod-like cockpit on a four-wheeled cargo platform.

It was tested with two tail configurations — vertical fin and V-tail.

The aircraft wing could be folded into a relatively small package for transport.



One pilot


10 ft 6 in (5.94 m)


33 ft 5 in (10.18 m)


1 × Continental IO-360-A,

210 hp (157 kW)


Maximum speed

65 mph (105 km/h, 56 kn)


120 mi (193 km, 100 nmi)

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