Curtiss BT-Flying Boat
Curtiss built at least one experimental type "BT" twin-propeller driven, tri-plane flying boat. He based his design on the suggestions developed by Second Lieutenant Norman B. Hall and Third Lieutenant Elmer F. Stone when Curtiss visited the officers on board their cutter Onondaga. Curtiss built the flying boat but with the onset of U.S. participation in World War One the project was shelved.
Aircraft History File, U.S. Coast Guard Historian’s Office.
Gordon Swanborough & Peter M. Bowers. United States Navy Aircraft Since 1911 (Annapolis: Naval Institute Press, 1990-third edition), pp. 164-165.
Arthur Pearcy, U.S. Coast Guard Aircraft Since 1916 (Annapolis: Naval Institute Press, 1991), pp. 158-159.