Discussion of types of airplanes which have obtained Department of Commerce approved type certificates; only 12 out of 170 planes have two or more motors; certificates issued for multi-passenger ships increased 400 per cent during last year.
Airplanes of today
West. Flying
Western Flying ; 6 , n 3
1929
1 Fig.
Article (Journal)
English
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Ambulance airplanes of today and tomorrow
Engineering Index Backfile | 1929
|The trends of today in airplanes and motors
Engineering Index Backfile | 1928
The trends of today in airplanes and motors
Engineering Index Backfile | 1928
Wiley | 2008
|Engineering Index Backfile | 1929
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