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The electrodynamometric balance of the small wind tunnel of the French Service of Aeronautical Research (1930)
NASA Technical Reports Server (NTRS) · leaf 13
N.A.C.A. Technical Memorandum No.556 Figs.7 &■ 8 Fig.8NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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