In the US, Wanamaker's commission built on Glen Curtiss's previous development and experience with the Curtiss Model F for the U.S. Navy, which rapidly resulted in the "America", designed under Porte's supervision following his study and rearrangement of the flight plan; the aircraft was a conventional biplane design with two-bay, unstaggered wings of unequal span with two pusher inline engines mounted side-by-side above the fuselage in the interplane gap. Wingtip pontoons were attached directly below the lower wings near their tips. The design (later developed into the Model H) resembled Curtiss's earlier flying boats but was built considerably larger so it could carry enough fuel to cover . The three crew members were accommodated in a fully enclosed cabin.