Front:
UNITED AIR LINES
A Century of Progress
in Transportation
31
71
Back:
Written and Mailed from the Dome of the
TRAVEL AND TRANSPORT BUILDING
A CENTURY OF PROGRESS
CHICAGO, ILLINOIS
HIS photograph shows a Century of Progress in transporta-
tion the famous old John Bull engine contrasted with
one of the new Boeing monoplanes in service on UNITED AIR
LINES' Coast-to-Coast and other routes. This three-mile-a-
minute plane is the world's fastest multi-motored passenger-
mail-express transport. It can fly nearly 150 miles an hour
faster than the train drawn by the old type engine. The UNITED
AIR LINES' plane was selected for exhibition in the Dome of
the Travel and Transport Building because it represents latest
features of airplane design and construction.
Powered with two 550 h. p. supercharged Wasp engines, these
Boeing Monoplanes can cruise 171 m. p. h. They land at the
low speed of 59 miles an hour and take off after a run of only
770 feet. They can climb 1320 feet a minute at sea level and to
10,000 feet in eleven minutes. Carrying a full load of ten passen-
gers, two pilots, stewardess, baggage, mail and express, these
planes can climb with only one of their two engines if necessary.
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drop card in
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Mail collected
several times
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