- Отрасли: Aviation
- Number of terms: 16387
- Number of blossaries: 0
- Company Profile:
Aviation Supplies & Academics, Inc. (ASA) develops and markets aviation supplies, software, and books for pilots, flight instructors, flight engineers, airline professionals, air traffic controllers, flight attendants, aviation technicians and enthusiasts. Established in 1947, ASA also provides ...
A dimensional check of an airframe to determine that the wings and tail are symmetrical about the longitudinal axis.
Industry:Aviation
A dimensionless number relating the amount of aerodynamic lift produced by an airfoil to its angle of attack.
Industry:Aviation
A dimensionless number that relates to the change in the physical dimensions of a material as the temperature of the material changes. The thermal expansion coefficient of aluminum is approximately twice that of steel.
Industry:Aviation
A dimensionless number used as a measure of some property or characteristic. For example, a coefficient of friction is a number used to indicate the relative amount of friction between different materials.
Industry:Aviation
A dimensionless number used in the formula for aerodynamic lift that varies with the shape of the airfoil and the angle of attack. The lift coefficient (CL) is obtained from wind tunnel data and is plotted on a set of airfoil characteristic curves.
Industry:Aviation
A dimensionless number used in the formula for finding the induced drag of an airfoil as it relates to the angle of attack.
Industry:Aviation
A dimensionless number used to determine the flow characteristics of a fluid passing over a body. Reynolds number (RN) is determined by the velocity of the fluid, the distance the fluid travels over the body, and the kinematic viscosity of the fluid. Kinematic viscosity is the absolute viscosity of the fluid divided by its density.
RN = Vx / ν
: V = Velocity in feet per second
: x = Distance from leading edge in feet
: n = kinematic viscosity in square feet per second
: RF energy. Radio frequency energy. Electromagnetic energy with a frequency high enough that it will radiate from any conductor through which it is flowing.
Industry:Aviation
A dimensionless number used to express the ratio of two powers or intensities. The number of bels is the logarithm of the ratio of the two values. A decibel (dB), one tenth of a bel, is more commonly used than the bel.
Industry:Aviation
A dimensionless number used to find the amount of induced drag produced by an airfoil.
The drag coefficient is determined by the shape of the airfoil section and by the angle of attack. The coefficient of drag for any airfoil section increases as the angle of attack increases.
Industry:Aviation
A dimensionless number used to show the ratio of the amount of force needed to move a body parallel to the surface on which it is resting to the amount of force needed to move the body perpendicular to the surface.
Industry:Aviation
