08/15/2008. Designed by Stearman for a 1942 bomber-trainer competition the XAT-15 was intended to give integrated training to all light bomber crew members, including the pilot, co-pilot, bombardier, and gunner.

Of composite construction due to the prevailing aluminum shortage, it had a welded steel tubing fuselage that was fabric covered, while the wing, tail plane, and fin were of wood with plywood covering.

Two aircraft were built, s/n 41-23162 and 41-23163 (c/n 120001) and orders for 1,045 were issued, however, these were cancelled when the USAAF decided against composite construction for advanced trainers.