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For supersonic speeds a different procedure called the supersonic area rule, developed by NACA aerodynamicist Robert Jones, is used. Transonic is one of the most important speed ranges for commercial and military fixed-wing aircraft today, with transonic acceleration an important performance requirement for combat aircraft and which is improved ...
A superficially related concept is the Whitcomb area rule, which states that wave drag due to volume in transonic flow depends primarily on the distribution of total cross-sectional area, and for low wave drag this distribution must be smooth. A common misconception is that the Sears–Haack body has the ideal area distribution according to the ...
It was redesigned to take the area rule into effect, allowing greatly improved performance. [18] This was the first US supersonic bomber, and was capable of Mach 2 at a time when Soviet fighters had only just attained that speed months earlier. [19] The area rule concept is now used in designing all transonic and supersonic aircraft.
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Designers use the Supersonic area rule and the Whitcomb area rule to minimize sudden changes in size. The sound source is traveling at 1.4 times the speed of sound, c (Mach 1.4). Because the source is moving faster than the sound waves it creates, it actually leads the advancing wavefront.
Transonic (or transsonic) flow is air flowing around an object at a speed that generates regions of both subsonic and supersonic airflow around that object. [1] The exact range of speeds depends on the object's critical Mach number, but transonic flow is seen at flight speeds close to the speed of sound (343 m/s at sea level), typically between Mach 0.8 and 1.2.
Next, thrust in an inward and upward motion on the diaphragm. This will force air out of the lungs and remove the blockage. Repeat these abdominal thrusts up to five times, the doctor advised.
Ludwig Prandtl Ring (1978); Langley Gold Medal (1981); Fluid Dynamics Prize (1986); NAS Award in Aeronautical Engineering (For his major contributions to aeronautics, including his supersonic area rule, discovery of the value of wing sweep in attaining supersonic flight, and application of the Heaviside Calculus to flight dynamics., 1990)