gyro drift — The movement of a gyro axis in the horizontal plane caused by real or apparent drift. Also called gyro wander or precession. See gyro wander … Aviation dictionary
wander — The movement of the spin axis of a gyroscope from its original position. Its value is the maximum at the poles and the least at the equator. This is one of the errors or shortfalls in a gyroscope. Gyro α at position 1 has its spin axis aligned… … Aviation dictionary
corrected gyro — A gyroscope corrected for apparent wander resulting from the earth’s rotation. Also called slaved gyro … Aviation dictionary
compensated gyro — A gyroscope compensated for apparent wander … Aviation dictionary
Heading indicator — A heading indicator in a small aircraft. The heading indicator (also called an HI) is a flight instrument used in an aircraft to inform the pilot of the aircraft s heading. It is sometimes referred to by its older names, the directional gyro or… … Wikipedia
Gyroscope — A gyroscope is a device for measuring or maintaining orientation, based on the principles of angular momentum [ [http://demonstrations.wolfram.com/Gyroscope/ Gyroscope] by Sándor Kabai, The Wolfram Demonstrations Project.] [… … Wikipedia
apparent precession — The apparent deflection of the gyro axis, relative to the Earth, due to the rotating effect of the Earth and not due to any applied force. Also called apparent wander … Military dictionary
Chip 'n' Dale — This article is about the characters. For the film, see Chip an Dale. For other homonyms, see Chippendale. Chip n Dale Title screen for Chip n Dale cartoons First appearance … Wikipedia
z correction — In air navigation, the correction made for errors caused by a directional gyro precession or wander and Coriolis acceleration. The latter correction is applied by moving a celestial fix or position at right angles to the track … Aviation dictionary
Gyro at position A has its spin axis aligned with true north. The gyro will maintain its alignment in space, the direction of true north relative to the gyro will change as the earth rotates and the observer’s position in space moves through B, C to D. This is apparent drift. It is zero at equator and maximum at the poles.