The Dornier "Do.X" Flying Boat (German) : A Giant High-Wing Monoplane Page: 3 of 26
[25] p. : ill.View a full description of this report.
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J.A.C.A. Aircraft Circular No. 109
each side of the longitudinal step are slightly concave. The
bow is sharply V-shaped, especially in the portion which is
above the water line while taxying on still water.
The wing stubs are strongly rounded downward, transversely
to the direction of flight, at the points where they meet the
sides of the hull. This novel shape, which had not been con-
templated in the original design, has both static and hydro-
dynamic advantages. The thickness of the stubs at their roots
is much greater, thus enabling a greatly increased stiffness
of the supporting members. During the take-off an outward mo-
tion is imparted to the water by the concave shape, while with
the old type of construction the water was forced into the
angle between the lower surface of each stub and the side of
the hull.
An outstanding feature in the design of the "Do.X" flying
boat is the division of the hull (for the first time in air-
craft construction), into three separate decks (Fig. 2). The
upper or so-called "control deck" contains the pilot room, the
commanders room, the engine-control room and the rooms for
the radio outfit and the auxiliary motors. The middle deck is
designed exclusively for passengers. It has a length of 23.5
m (77.1 ft.), a height of approximately 2 m (6.56 ft.), and a
maximum vidth of 3,.5 m (11.48 ft.). The bottom deck or hold
contains the fuel, provisions, freight and luggage.
During the investigations required by the design wotk,
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Dornier, Claude. The Dornier "Do.X" Flying Boat (German) : A Giant High-Wing Monoplane, report, February 1930; (https://digital.library.unt.edu/ark:/67531/metadc279522/m1/3/: accessed April 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.