Wind Tunnel Tests on Autorotation and the "Flat Spin." (1928)
NASA Technical Reports Server (NTRS) · leaf 5
4 REPORT NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS In this report three terms are used with reference to rotation about a fixed axis in the plane of symmetry and parallel to the wind direction. They are defined as follows: 1. ''Stable autorotation'' signifies a state of equilibrium in… … FIG. l.-Biplane mounted on autorotation apparatus Pl^H, having theSC profiles WCrC tested as monoplanes. An unstag- gered biplane cell of Gottingen 387-FB profile was also tested. The autorotation apparatus, illustrated in Figures 1 and 2, consisted of a barrel containing ball bearings supporting a…
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