| 摘要 |
An aerofoil member (10) comprising a 'smart core' (14) and a flexible skin (12). The core comprises sheet material elements (16) forming adjoining cells (18). The length of the elements can be changed, for example using the piezo-electric effect, to alter the cross-sectional shape of the aerofoil without changing the peripheral length. Thus the shape of the aerofoil may be changed to suit different flight conditions, or to mimic the effect of control surfaces.
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