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The Fokker "Universal" commercial airplane (1928)
NASA Technical Reports Server (NTRS) · leaf 11
,24"-J K 13'2 N.A.C.A. Aircraft Fig.l Circular Ho.73 Effective Wright wing Whirlwind J-5 (3 ct engine 330 sq.ft. Fig.l Fokker "Universal" airplane.NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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