Lockheed YO-3A Quiet Star

Pima Air and Space Museum Aircraft

Manufacturer
Lockheed
Markings
Federal Bureau of Investigation, 1982
Designation
YO-3A
Serial Number
69-18006

Lockheed YO-3A Quiet Star

The YO-3A was designed to provide a very quiet aircraft for low-altitude, night reconnaissance flights over Vietnam. Lockheed based the plane on a Schweizer SGS 2-32 sailplane. The gliders were heavily modified to add a specially muffled engine and a slow-turning three-blade propeller. Flying at 1,000 feet and using night vision equipment the Quietstar tracked North Vietnamese troop movements without the people on the ground ever even hearing the aircraft. After their service in Vietnam YO-3As were used by NASA for studies of aircraft noise, by the Louisiana Department of Wildlife and Fisheries for tracking poachers, and by the Federal Bureau of Investigation.

Specifications
Wingspan 57 ft
Length 29 ft 4 in
Height 9 ft 1 in
Weight 3,519 lbs (loaded)
Max. Speed 138 mph
Service Ceiling 14,000 ft
Range 500 miles
Engines 1 Continental IO-360D six-cylinder engine with 210 horsepower
Crew 2