In the course of its long operational life, the
DC-3 underwent a series of modifications
and adaptations that enabled it to operate in
very different contexts, and to fulfil the most
varied missions. For instance, for the US Navy
the Douglas Aircraft Company developed
and built (for experimentation purposes) an
amphibious version of the plane, intended to
provide transport and logistical support for the
forces involved in the Pacific War. The aircraft,
designated the C-47C and tested during 1943,
was to have been built at the Long Beach plant.
Before it actually went into production, however,
developments in the conflict and the ability of
the US Naval Construction Force (‘Seabees’) to
equip the islands conquered by the US with the
necessary ground infrastructure had already made
such a plane obsolete, so large-scale production
never started.
The most striking feature of the C-47C was the
pair of EDO Model 78 floats. These were 42
feet long and five feet eight inches wide at the
nominal flotation line, with a draught of five
feet and a displacement of 29,000 pounds.
Equipped with two retractable wheels, plus a set
of non-retractable wheels for use on land, the
floats consisted of 14 watertight compartments.
Inside, they contained two auxiliary fuel tanks with
a capacity of 325 gallons each. The prototype
of the C-47C (XC-47C, SN 42-5671) crashed in
Jamaica Bay, New York, on 13 November 1943
because of excessive weight. However, because
of the availability of the floats (according to the
various sources, EDO produced between 30 and
150 pairs, most of which were sold as surplus),
a number of C-47s and DC-3s were converted
‘in the field’ for amphibious use, both during and
after the war.
model. Finally, in the Japanese aircraft
intended for military use, the scarcity of
metal resulted in a greater use of wood
for components such as the tail assembly,
rudder, stabilisers, tabs, flaps, hatches
and parts of the fuselage which were less
stressed, such as the tail cone. The Showa
company even designed a version of the
aircraft to be constructed entirely in wood,
the L2D5, but no examples were ever built.
The C-47C was another attempt to adapt the DC-3 to meet the particular
requirements of the war in the Pacic. Fitted with a pair of EDO Model 78 oats and
auxiliary fuel tanks carrying an additional 750 gallons, it was intended to provide
logistical support for the troops involved in the campaign against Japan. The changing
situation of the war in the Pacic made it obsolete even before it went into production,
but the plentiful availability of surplus materials – particularly in the post-war years –
made it possible to develop and build various DC-3s in amphibious versions.
The C-47C:
The amphibious DC-3
The Showa L2D3: powered by Mitsubishi Kinsei engines in its 51, 52 and 53 versions, this was one of the
variations of the Showa/Nakajima L2D used by the Japanese Armed Forces during the Second World
War. Although Nakajima Hikoki had acquired the licence to produce the DC-3 for civilian purposes, the
Imperial Armed Forces were always in de facto control of the project, because they needed the planes to
y to war zones across Asia and the Pacic.
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