Description: From Introduction: "This report is the second phase of a broad program of study of the transient motions of helicopters in autorotative flight. The first phase (reference 1) dealt with the steady-state condition of autorotative vertical descent. This report is concerned with the the transition from the steady condition of hovering to the steady autorotative descent."
Date: June 1949
Creator: Nikolsky, A A & Seckel, Edward
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