FSX Douglas O-46. The Douglas O46 was the last of a long line of Douglas Obsevation aircraft designed for the USAAC. It first entered service in 1937. This is an FSX Acceleration native model. It has the usual animations, reflective glass, working cowl flaps, some bump maps and .dds textures. The 2D panel and VC are based on panels of similar craft of the same era. The VC has working instruments and animated flight controls. By Paul Clawson.