War Eagles Air Museum, Santa Teresa, New Mexico The BT-13B was a trainer used by both the U.S. Army Air Corps and U.S. Navy during the Second World War. For the most part this airplane was replaced by the AT-6. Following the 2nd World War many of these planes were sold for a few hundred dollars and in many cases their engines were placed in surplus biplanes to become cropdusters. See also Pima Air and Space Museum, Tucson, Arizona.