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Heinkel H.E. 50 commercial seaplane : winner of the 1926 German Seaplane Contest at Warnemunde (1927)
NASA Technical Reports Server (NTRS) · leaf 9
N.A.C.A. Aircraft Circular No.38 Figs.8,9,10 4 11 Figs. 8 4 9 Holnkel H.E.5;450 HP. Napier "Lion" engine. Winner of 15^6 Germa.n seaplane oorci: atit.ion.NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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