Cessna O-2 Skymaster USAF airplane model. The O-2 is a military version of the Cessna Model 337 Super Skymaster. Distinguished by twin tail booms and tandem-mounted engines, it features a tractor-pusher propeller arrangement. Derived from the Cessna Model 336, the Model 337 went into production for the civilian market in 1965. This unorthodox all-metal business aircraft resulted from several years of study by Cessna aimed at producing a twin-engine airplane that would be simple to fly, low in cost, safe and comfortable, while offering all the traditional advantages of two engines.
In late 1966, the USAF selected a military variant, designated O-2, to supplement the O-1 Bird Dog forward air controller (FAC) aircraft then operating in Southeast Asia. The O-2 first flew in Jan. 1967 and production deliveries began in March. Production ended in June 1970 after 532 O-2s had been built for the USAF.