subsonic inlets
For aircraft that cannot go faster than the speed of sound (like large airliners), a simple, straight, short inlet works quite well.
Subsonic conditions occur for Mach numbers less than one, M . For the lowest subsonic conditions, compressibility can be ignored.
SUBSONIC - Flight at a speed below that of sound.
SUPERCHARGER - A form of compressor, often turbine-driven, ...
Subsonic: 100-350 MPH. Transonic: 350-750 MPH. Supersonic:760-3500 MPH. Hypersonic: 3500-7000 MPH Roll To roll the plane to the right or left, the ailerons are raised on one wing and lowered on the other.
Contents: Some Reasons and Some Terminology; Distances, Velocities, and Times; Force, Mass, and Moments; Static Properties of the Atmosphere; Subsonic Fluid Flow; Transonic and Supersonic Fluid Flow; Airspeeds; Determining Airfoil Properties; ...
One way to avoid the need for a dedicated supersonic wing is to use a highly swept subsonic design. Airflow behind the shock waves of a moving body are reduced to subsonic speeds.
The routing from Dulles to Miami was flown subsonically as far as Carolina Beach VOR; then there was a very rapid climb to 60,000 feet (estimated at 6,000 feet per minute) and Mach 2.
If the aircraft is moving slower then the speed of sound then it is said that the aircraft is subsonic. If the aircraft is moving close to or a little more then the speed of sound then the aircraft is trans sonic.
(a) subsonic airfoil (b) supersonic airfoil
The most forward point of the airfoil is defined as the leading edge and the most rearward point is defined as the trailing edge.
For a very different reason: to slow the airflow so that the compressor can operate subsonically even when the aircraft is close to sonic speeds-or even supersonic! ...
at subsonic speed, the magnitude of the aerodynamic moment remains nearly
constant even when the angle of attack changes.
This location is called the wing's Aerodynamic Centre AC.
For subsonic airplanes, dynamic effects may generally be handled by correcting these static characteristics suitably.
High technology or not, sooner or later the fight comes down to subsonic, yank and bank affairs where the name of the game is knowing how to manage the energy your airplane possesses so as to trade that energy for position on your adversary.
 See also: Aircraft, Speed, Flight, Force, Supersonic
  
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