High Quality Content by WIKIPEDIA articles! The Loening Model 23 Air Yacht was a small flying boat airliner produced in the United States in the early 1920s. It was a high-wing, strut-braced monoplane with the engine mounted pusher-fashion in a nacelle atop the wing. The cabin was semi-enclosed, featuring side windows but no roof, and was located immediately ahead of the wing. Twin tails were fitted, carrying a common stabiliser in a high position. The construction was unusual, in that rather than the flying boat hull being integral with the fuselage, the Model 23`s hull was a large, separate pontoon mounted directly underneath a fuselage that was a separate structure. This was intended to combine the safety of the a floatplane design with the low parasitic drag of a conventional flying boatGrover Loening was awarded the 1921 Aero Club of America Trophy for the design.