The Model 6D continued the designation series of the 1919 Boeing Model 6 but the only similarity was that they are both biplane pusher flying-boats. The 6D was designed in 1928 and 2 aircraft were built between May 1928 and April 1929. The 6Ds rectangular hull was constructed of wood with wood longerons, covered in spruce veneer. Wings were taken from the Model 40 and shortened, with the pusher engine and wood propeller mounted on the lower side of the upper wing.
Boeing model B1D/6D drawing
A slightly heavier, more robustly built version, powered by a 410 hp (310 kW) Pratt & Whitney R-1340 Wasp engine, was produced as the B-1E / Model 204 / Model 204A.
Almost identical to the B-1D with strengthened structure, the B-1E was powered by a 410 hp (310 kW) Pratt & Whitney R-1340 Wasp. Five aircraft were built, of a batch of ten, the remaining aircraft were re-designated Model 204.
Five B-1E airframes re-designated before completion. Only two were completed by Boeing, one Model 204 and one Model 204A, with a third completed by a private party using the c/n and registration of the original airframe.
The second Model 204 airframe completed as a dual-control trainer for William E. Boeing.
Data from Boeing aircraft since 1916, Jane's all the World's Aircraft 1928
The following is a list of seaplanes and amphibious aircraft, which includes floatplanes and flying boats, by country of origin.
Seaplanes are any aircraft that has the capability of landing on water while amphibious aircraft are equipped with wheels to alight on land, as well as being able to land on the water. Flying boats rely on the fuselage or hull for buoyancy, while floatplanes rely on external pontoons or floats. Some experimental aircraft used specially designed skis to skim across the water but did not always have a corresponding ability to float.
This list does not include ekranoplans, 'Wing-In-Ground-effect' (WIG), water-skimmers, wingships or similar vehicles reliant on ground effect.
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