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National
Air and Space
Museum
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Northrop Alpha
(TWA)
The Alpha carried passengers in an enclosed cabin, along
with 465 pounds (209 kilograms) of mail; but the pilot still sat outside
in an open cockpit. It had a strong, yet light, design of its multicellular
wing, which is still used by aircraft designers. The Alpha was retired
from service in the mid-1930s.
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