<hi style=afpcap>The Consolidated PT-3 primary trainer series was developed for the observation role with the designation O-17. The prototype XO-17 was a converted PT-3 which was refined with improved fuselage streamlining, an increased fuel capacity and other minor modifications. A removable fairing was provided for the rear cockpit to enable a standard Scarff gun ring to be fitted. Only 29 O-17s were built, with most being supplied to the National Guard. </hi>