- Industry: 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 rapidly growing cumulus cloud in which its height is greater than its width.
Industry:Aviation
A rapidly spinning wheel with its weight concentrated about its rim.
Gyroscopes have two basic characteristics that make them useful: rigidity in space and precession. Because of its rigidity in space, the spinning gyroscope does not tilt its axis of rotation as the earth rotates.
Precession is the characteristic that causes the gyroscope to react to an applied force at a point 90° away from the point of application, in the direction of its rotation. Gyroscopes are used in both attitude and rate indicating flight instruments.
Industry:Aviation
A rare, metallic chemical element that melts at approximately 30°C. Gallium’s symbol is Ga, its atomic number is 31, and its atomic weight is 69.72. Gallium is used as a doping agent in the manufacture of semiconductors.
Industry:Aviation
A rare, radioactive chemical element in the actinide group. Protactinium’s symbol is Pa, and its atomic number is 91. The most common isotope of protactinium, Pa 231, has a half-life of more than 32,000 years.
Industry:Aviation
A rate gyro flight instrument that gives the pilot an indication of the rate of rotation of the aircraft about its vertical axis. The turn and slip indicator shows the trim condition of the aircraft and serves as an emergency source of bank information in case the attitude gyro fails.
The turn indicator uses a rate gyro attached through a fork and pin mechanism to a vertical pointer. This rate gyro is installed so it measures the rate of rotation about the vertical axis of the aircraft. The vertical pointer shows when a standard rate turn (3° per second for some aircraft, and 1 1/2° per second for others) is being made. The slip indicator is a curved glass tube partially filled with a liquid in which a black glass ball rolls.
When the angle of bank is correct for the rate of turn, centrifugal force and gravity are balanced, and the ball stays in the center of the tube. When the rate of turn is too high for the angle of bank, the centrifugal force is greater than the force of gravity and the ball rolls to the outside of the turn. When the rate of turn is too low for the angle of bank being used, the force of gravity is greater than the centrifugal force, and the ball rolls to the inside of the turn. Turn and slip indicators were once called needle and ball
Industry:Aviation
A rate gyro instrument that shows at a glance when a standard-rate turn is being made. The dial has a symbol which represents the rear of an airplane with marks that align with its wing tip when a standard-rate turn of 3° per second is being made. A black ball in a curved glass tube below the airplane symbol shows when the angle of bank is correct for the rate of turn being made.
The rate gyro is mounted in a canted gimbal (a tilted mounting frame) that allows the gyro to precess, or roll over, when the aircraft rotates about either its vertical or longitudinal axes. The gyro sensing rotation about both axes makes the instrument more sensitive and gives a more accurate indication of the condition of a turn than that shown by a turn and slip indicator.
Industry:Aviation
A rate gyro whose gimbal axis is tilted so it can sense rotation of the aircraft about its roll axis as well as its yaw axis.
Industry:Aviation
A rate-type flight instrument used to show the pilot the rate at which the aircraft is rotating about its vertical axis. Both turn and slip indicators and turn coordinators are gyroscopic turn indicators.
Industry:Aviation
A rating accompanied by a time limit, such as 180-minute ETOPS, that allows twin-engine civil transport aircraft to fly over oceans and deserts provided it is never more than 180 minutes away from a suitable airfield.
Industry:Aviation
A rating for aircraft reciprocating engines. METO power is the maximum power allowed to be continuously produced by an engine. Takeoff power is usually limited to a given amount of time, such as one minute or five minutes.
Industry:Aviation
