The O-2 Skymaster (also known as the "Oscar Deuce" or "The Duck") is a military version of the Cessna 337 Super Skymaster utilized as an observation and forward air control (FAC) aircraft. The USAF commissioned Cessna to build a military variant to replace the O-1 Bird Dog in 1966.
19th Century - 1883 Alexandre Goupil . Goupil proposes a steam-powered monoplane (shaped like a duck),with tractor propeller. His full-size test rig lifts itself and two men in a light breeze, but the design is never built