- 업종: 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 ...
An aerodynamic condition in which the angle of attack, the angle at which the relative wind strikes the airfoil, becomes so steep the air can no longer flow smoothly over the airfoil. When an airfoil stalls, it stops producing lift.
Industry:Aviation
An aerodynamic force acting in the same plane as the relative wind striking an airfoil. Two basic types of drag act on an aircraft in flight: induced drag and parasite drag.
Induced drag is caused by the same factors that produce lift, and its amount varies inversely as the airspeed. As the airspeed decreases, the angle of attack must increase, and this increases the induced drag.
Parasite drag is caused by the friction of air moving over the structure, and its amount varies directly as the airspeed. The higher the airspeed, the greater the parasite drag.
Industry:Aviation
An aerodynamic force caused by air flowing over a specially shaped surface called an airfoil. The airfoil is curved in such a way that the air flowing over the upper surface finds the surface falling away from it. The air is being pressed onto the surface by the air above it, and in order for it to remain on the surface, it must speed up. As the air speeds up, its pressure drops, and the air above it flows down to fill the low-pressure area.
The air below the airfoil finds the surface rising into its flow path, and this slows the air. As the air slows down, its pressure rises, and it forces the surrounding air away from it. The combination of the low pressure pulling air down to the airfoil and the high pressure forcing air away from the airfoil causes the air to be deflected downward. When an airfoil forces air downward, a force equal to the weight of the deflected air forces the airfoil upward. This force is called lift.
Industry:Aviation
An aerodynamic force that tries to move the compressor forward in its case. Axial loading is supported in a gas turbine engine in ball bearings.
Industry:Aviation
An aerodynamic force which causes an autogiro or helicopter rotor to turn when no power is supplied to it.
It is an autorotative force that causes a spinning airplane to rotate about its spin axis.
Industry:Aviation
An aerodynamic measurement found by dividing the span of an airfoil by the total weight the airfoil supports.
Industry:Aviation
An aeronautical beacon used to aid in locating an aerodrome from the air.
Industry:Aviation
An aeronautical chart drawn to a scale of 1:500,000 (one inch is equal to eight statute miles). Sectional charts are designed for visual navigation of slow- or medium-speed aircraft. Topographic information on these charts feature the portrayal of relief and a judicious selection of visual checkpoints for VFR flight. Aeronautical information includes visual and radio aids to navigation, airports, controlled airspace, restricted areas, obstructions, and related data.
Industry:Aviation
An aeronautical chart, drawn to a scale of 1:250,000 (one inch is equal to four statute miles). This chart depicts terminal control area (TCA) airspace which provides for the control or segregation of all aircraft within the TCA.
The topographic and aeronautical information depicted on terminal area charts includes visual and radio aids to navigation, airports, controlled airspace, restricted areas, obstructions, and related data.
Industry:Aviation
An aeronautical vehicle operated under 14 CFR Part 103 for sport or recreational purposes which does not require FAA registration, an airworthiness certificate, nor pilot certification.
Ultralights are primarily single-occupant vehicles, although some two-place vehicles are authorized for training purposes. Operation of an ultralight vehicle in certain airspace requires authorization from ATC.
Industry:Aviation
