JOURNEY IN AERONAUTICAL
RESEARCH: A Career at NASA Langley Research Center
Monographs in
Aerospace History, Number 12
FIGURE 9.6. Damping of oscillations of
a weathervane computed by finite-span, quasistatic, and
two-dimensional theories. N1/2, the number of cycles to
damp to half amplitude, is plotted as; function of 
, where 
is frequency
in radians per second, b is span of weather vane, and v is velocity.
Frequency varied by changing the inertia.
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