The dawn of a new era
cooled engines with nine radial cylinders,
each engine developing 1,000bhp.
Subsequently, it was fitted with two P & W
SB3G engines of the same power, and in
the DST-A version, with two Cyclone G 102
engines. As in the DC-1 and DC-2 (and,
as would be the case with the DC-3 too),
the engines were mounted in a nacelle
that also incorporated the recess for the
retractable undercarriage. Furthermore, the
engines could be removed
en bloc
from the
aircraft, together with the main connections
and accessories, thus making maintenance
work much quicker. This particular feature
was used again in the DC-3, which in its
first configuration was powered by the
same Cyclone G2 engines as the DST; in
the course of time these were replaced by
the versions G102, G103, G102A, G2E,
G1OA and G202A, and in the case of
the DC-3A, by the various versions of the
P & W R-1830 ‘Twin Wasp’.
The pilot’s cabin, cockpit and controls
also followed the same layout as those
Above, a detail of the
front landing gear of a
DC-3. Enormous efforts
were made to increase
the sturdiness of the
landing gear and to make
its operation smoother.
The front wheels of
the DC-3 touched the
ground first, and only
after this would a further
reduction in speed result
in the little rear wheel
touching the ground.
(including American Airlines themselves)
used it regularly for daily flights, while
waiting for its replacement to be available.
Continual evolution
In its first version, the DST was powered
by two Wright Cyclone R-1820 G2 air-
Arthur Emmons Raymond (1899-1999) was a central figure in the
development of the DST/DC-3. Raymond was born in Boston and
grew up in Pasadena. He was taken on by Douglas in May 1925, and
a short time later he joined the design department. In the course of
his career, he became first Chief Engineer (1934), and then Vice-
President of the company with responsibility for design (1939), an
office he held until 1960, the year he retired. For almost 35 years,
Raymond was involved in all the major projects of the Douglas
Aircraft Company, from the DC-2 to the DC-8, and he played a key
role in planning the company’s activities during the Second World
War. Between 1960 and 1969, Raymond collaborated with NASA
on the design of the Gemini and Apollo missions. Raymond also
played a vital part in the creation in 1946 of RAND (Research ANd
Development), which developed over the years into the well-known
think tank of international politics.
The Designer: Arthur E. Raymond
The instrument panel of the DST consisted of
115 items, including switches, gauges and other
control instruments.
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Build Douglas DC
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3