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11 Cards in this Set
- Front
- Back
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Indicated Airspeed (IAS) |
The speed shown on the cockpit airspeed indicator |
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Calibrated Airspeed (CAS) |
Indicated airspeed corrected for positioning error of the pitot-static port |
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Equivalent Airspeed (EAS) |
Calibrated airspeed corrected for compressibility error. These errors are the result of different altitudes and speeds, higher and faster making greater variations. |
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True Airspeed (TAS) |
Equivalent airspeed corrected for air density. Air density if affected by differences in air pressure and temperature. True airspeed is the velocity used in the lift equation. |
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Ground Speed (GS) |
True airspeed corrected for wind. it is the speed at which an ac moves over the surface of the earth. |
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Speed of Sound |
The speed at which sound waves propagate through the air. Speed varies with temperature, with colder temperatures reducing that speed. Therefore, higher altitude has slower speed of sound. |
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Mach Number |
TAS of an aircraft divided by the relative speed of sound. Ex. 0.5 mach is half the speed of sound. The T-6 electronic airspeed indicator (EASI) starts measuring at 0.4 mach and above. |
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Position error |
An error in airspeed measurement resulting from the location of the pitot-static system on an aircraft. |
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Compressibility |
The tendency of air molecules to increase in density when they impact or flow around a moving aircraft. The effect is negligable below about Mach 0.3 and becomes increasingly more significant as mach number and altitude increases. |
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What is the lift equation and how can one manipulate lift. |
L = 1/2 p V^2 S CL Velocity is in TAS and CL is a unit less coefficient of lift. You can manipulate lift by altering velocity, AoA and Camber (e.g. flaps) |
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Dynamic Pressure equation |
Dynamic Pressure (q) r 1/2 p V^2 This is part of the lift equation |
