Abstract
An advanced high lift system is being developed which combines a circulation control wing (CCW) with upper surface blowing (USB) to produce significant lift for STOL operations by Navy aircraft. The concept uses circulation control (CC) to pneumatically deflect USB engine thrust and thus augment aerodynamic wing lift produced by the outboard CCW. Wind tunnel investigations have confirmed significant thrust turning to angles near 165 deg, providing a simple, highly effective STOL and thrust reverser system. A no-moving-parts VTOL system obtained by deflecting thrust to angles around 90 deg is also suggested. The paper presents experimental results, a conceptual design for a proposed CCW + CC/USB STOL aircraft, and predicted STOL characteristics for that aircraft. Payoff in aircraft mechanical simplicity is also discussed.
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