One method studied uses retractable airfoil in front of cowl to generate thrust; other method involves hinging cowl lip inward so that captured airflow is choked, thus lowering pressures on external surfaces; both schemes were successful in reducing drag at captured airflow rates less than choking point of plain inlet; although drag was not reduced below critical drag of plain inlet, tests indicate that this may be possible.
Studies of drag-reduction methods for subsonic operation of supersonic inlets
J Aircraft
Journal of Aircraft ; 4 , n 4
1967
6 pages
Article (Journal)
English
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Subsonic-transonic-drag of supersonic inlets.
AIAA | 1967
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