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Fig. 3. Smoke wire visualisation of tethered Manduca sexta with the plane
of the undisturbed smokestreams coincident with the thorax, close to the
centreline. Flow is attached for the majority of the downstroke but separates
at the end of the downstroke (images C-E); the separation has the same size
and form as that containing an LEV in Fig.
2, and in previously published flow visualisations of outboard
positions along the wing (Willmott et al.,
1997; Ellington et al.,
1996). The centreline position has not previously been analysed by
flow visualisation.
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