Wings which redirect air to waggle sideways could cut airline fuel bills by 20% according to research funded by the Engineering and Physical Sciences Research Council (EPSRC) and Airbus in the UK. The new approach, which promises to dramatically reduce mid-flight drag, uses tiny air powered jets which redirect the air, making it flow sideways back and forth over the wing. The jets work by the Helmholtz resonance principle - when air is forced into a cavity the pressure increases. (source: epsrc.ac.uk)
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