Air Force Tests of Sperry Messenger Model with Six Sets of Wings (1928)
NASA Technical Reports Server (NTRS) · leaf 5
4 REPORT NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS Fig. I.—Model of Sperry Messenger airplane , CD „ Or) … Fig. 2—Plan, elevations, and dimensions of the Sperry Messenger model
NASA Technical Reports Server (NTRS)
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