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Fig. 3. Sinusoidal length changes replicated the major components of the in
vivo strain trajectory. (A) Two cycles of length change from work loop
measurements (solid lines) and from tethered flight (dotted lines, from
Tu and Daniel, 2004) chosen on
the basis of their closely matching frequency and amplitude. Trajectories
recorded during tethered flight matched sinusoidal length changes through most
of the cycle but were typically more complex at the transitions from
lengthening to shortening. (B) Fourier spectra calculated from the two records
shown in A. Sinusoidal length changes replicated the dominant characteristics
of the length changes recorded in tethered flight.
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