Accession Number:

ADA003325

Title:

Investigation of Upper Surface Blowing Applied to High Speed Aircraft.

Descriptive Note:

Final technical rept. 1 May 73-2 May 74,

Corporate Author:

BOEING AEROSPACE CO SEATTLE WASH RESEARCH AND ENGINEERING DIV

Personal Author(s):

• Ishimitsu,Kichio K.

Report Date:

1974-07-02

Pagination or Media Count:

248.0

Abstract:

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.

Descriptors:

• *LIFT
• *TRANSONIC AIRCRAFT
• *JET FLAPS
• WIND TUNNEL TESTS
• UTILIZATION
• THRUST
• FLIGHT SPEEDS
• TRAILING EDGES
• EXHAUST GASES
• APPROACH
• TURNING FLIGHT
• COANDA EFFECT

Subject Categories:

• Aerodynamics
• Aircraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE