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.
Low sonic boom shock control/alleviation surface
1998-04-21
Miscellaneous
No indication
English
Sonic Boom Alleviation Using Keel Configurations
Online Contents | 2003
|Sonic Boom Alleviation Using Keel Configurations
AIAA | 2003
|Alleviation of the Sonic Boom by Thermal Means
AIAA | 1972
|On alleviation of the sonic boom by thermal means
AIAA | 1970
|