compressibility effect

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• compressibility effect — The sudden increase in the total drag of an airfoil in transonic flight caused by formation of a shock wave on the surface …   Aviation dictionary

• compressibility effect — noun : any of the effects (as abrupt changes in control characteristics) that result from changes in the flow field about an airplane when the velocity at some point in the field reaches the local speed of sound and the air ceases to behave as an …   Useful english dictionary

• compressibility error — An error in the airspeed indicator, which presumes that the air is incompressible. However, air is compressible and the higher the speed, the higher pressure it will indicate. An ASI (airspeed indicator) overreads because of the compressibility… …   Aviation dictionary

• Compressibility — This article is about thermodynamics and fluid mechanics. For other uses, see Compression (disambiguation). Incompressibility redirects here. For the property of vector fields, see Solenoidal vector field. Thermodynamics …   Wikipedia

• Compressibility factor — Thermodynamics …   Wikipedia

• scale-altitude effect — An error in the air speed indicator at the speeds where the effects of compressibility start. At these high speeds, an air speed indicator overreads as if it were at a lower altitude. Another name for compressibility error …   Aviation dictionary

• impact pressure — i. The pressure of a moving fluid brought to rest that is in excess of the pressure the fluid has when it does not flow (i.e., total pressure less static pressure). Impact pressure is equal to dynamic pressure in an incompressible flow, but, in a …   Aviation dictionary

• maximum speed — The maximum TAS (true air speed) that can be obtained in a steady level flight irrespective of altitude. The maximum level speed is attained at a point where the power available and the power required curves intersect. There may be some other… …   Aviation dictionary

• Gas — This article is about the physical properties of gas as a state of matter. For the uses of gases, and other meanings, see Gas (disambiguation). Ga …   Wikipedia

• Lockheed P-38 Lightning — P 38 redirects here. For other uses, see P 38 (disambiguation). P 38 Lightning P 38H 5 LO, AAF Ser. No. 4 …   Wikipedia

• fluid mechanics — an applied science dealing with the basic principles of gaseous and liquid matter. Cf. fluid dynamics. [1940 45] * * * Study of the effects of forces and energy on liquids and gases. One branch of the field, hydrostatics, deals with fluids at… …   Universalium