Investigation of Upper Surface Blowing Applied to High Speed Aircraft.
Final technical rept. 1 May 73-2 May 74,
BOEING AEROSPACE CO SEATTLE WASH RESEARCH AND ENGINEERING DIV
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A preliminary evaluation of a transonic, propulsive, life augmentation system known as upper surface blowing USB has been completed. USB is a thick jet, jet flap powered lift concept which uses a trailing edge flap and the Coanda effect to vector the jet engine exhaust for lift augmentation. A wind tunnel test has demonstrated lift induction induction increments 1 12 to 3 times the thrust vectored component in the lift direction. An estimate of a USB fighter performance shows a possible 40 knot reduction in approach speed and a 10 reduction in trun radius for a maximum sustained g turn at Mach 0.90 and 30,000 feet altitude.