1961, the prototype Model 336 Skymaster was first
flown. Cessna had chosen a push-pull twin engine design to
eliminate asymmetrical thrust in the event of an engine failure
resulting in an easier aircraft to fly.
In 1965, Cessna introduced the Model 337 Super
Skymaster with retractable landing
gear. This aircraft was
ordered by the U.S. Air Force "off the shelf" in 1967 as a
forward air controller (FAC). In this role, the O-2A
Skymaster was modified to carry flares, rockets and light
The O-2 was also known as the "Oscar Deuce".