Cessna O-2A Skymaster In late 1966 the U.S. Air Force selected a military variant of the Cessna Model 337 Super Skymaster, designated the O-2, to supplement the O-1 Bird Dog forward air controller (FAC) aircraft then operating in Southeast Asia. Distinguished by twin tail booms and tandem-mounted engines, it featured a tractor-pusher propeller arrangement. Having twin engines enabled the O-2 to absorb more ground fire and still return safely, endearing it to its crews. The O-2 first flew in Janu