Kaiser-Fleetwings' entered its XBTK-1 in a United States Navy attack aircraft competition, with five aircraft being flown.
The Fleetwings BT-12 Sophomore, also known by the company designation Model 23, was a 1940s all-metal basic training monoplane built by Fleetwings for the United States Army Air Forces.
The Sea Bird was an amphibious utility aircraft designed in 1934-5 by James C. Reddig for Fleetwings, Inc., of Bristol, PA.