O-1 Bird Dog observation aircraft

While in military service, the Bird Dog light observation aircraft, was generally used for artillery fire observation and direction. It was based on the Cessna 170 high-wing general aviation aircraft design. The prototype was designated Model 305.

The design had a high wing braced by struts attached to the landing gear mounts in the fuselage. The trailing edge had split flaps inboard of ailerons. In most Bird Dogs, the tail had a gentle curve to both the fin and rudder as well as...