Aeronautics and astronautics – Miscellaneous
Patent
1994-09-22
1998-04-21
Barefoot, Galen L.
Aeronautics and astronautics
Miscellaneous
244 75R, 244 45A, B46C 3000
Patent
active
057409846
ABSTRACT:
A sonic control device that reduces the effects of shock waves generated by an aircraft traveling at supersonic speeds. The control device includes a control surface located at or near the nose section of the aircraft. The position of the control surface can be moved between a retracted position and an extended position. When in a deflected position, the control surface increases the air pressure at the nose section. The increase in air pressure at the nose section decreases both the pressure amplitude and the slope of the overall shock wave as the wave travels toward the ground. Additionally, the deflection of the control surface may induce a downward directed pressure increase which creates less of a drag penalty than a truly blunt nose. When shock control is not desired, the control surface is moved back to the retracted position to reduce the drag on the plane. The moving control device allows a supersonic aircraft to efficiently travel above both land and water.
REFERENCES:
patent: 2944765 (1960-07-01), Lane et al.
patent: 2980370 (1961-04-01), Takacs
patent: 2986370 (1961-09-01), Takacs
patent: 3152775 (1964-10-01), Boyd
patent: 3161379 (1964-12-01), Lane
patent: 3240447 (1966-03-01), Olshausen
patent: 3425650 (1969-02-01), Silva
patent: 3478989 (1969-11-01), Bielefeldt
patent: 3497163 (1970-02-01), Wakefield
patent: 4008867 (1977-02-01), Kaniut
patent: 4691879 (1987-09-01), Greene
A.R. George and R. Seebass; Sonic Boom Minimization Including Both Front and Rear Shocks, pp. 2091-2093, vol. 9, No. 10, AIAA Journal, Oct. 1971.
A.R. Seebass and A.R. George; Design and Operation of Aircraft to Minimize Their Sonic Boom, presented at Paper 73-241 at the AIAA 11th Aerospace Sciences Meeting, Washington, DC, Jan. 10-12, 1974.
R. Seebass and A.R. George; Sonic-Boom Minimization, The Journal of Acoustical Society of America, pp. 668-693, vol. 51, No. 2 (Part 3), 1972.
Barefoot Galen L.
McDonnell Douglas Corporation
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