apparent drift of gyro

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• apparent drift — An error in the directional gyro resulting from the effect of the earth’s rotation and longitudinal position. At the equator, the rotation of the earth causes no movement of the observer about the directional gyro vertical axis, and there is thus …   Aviation dictionary

• gyro wander — The undesired movement of a spin axis from its original position. Gyro wander can be apparent or real. Apparent gyro wander is the result of the movement of the earth and is as shown in the illustration. Real wander can result from mechanical… …   Aviation dictionary

• 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

• drift — i. The lateral divergence from the prescribed flight path of an aircraft resulting primarily from the effects of a cross wind. ii. A slow movement in one direction of an instrument pointer or other marker. iii. A slow change in frequency of a… …   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

• Norden bombsight — The Norden bombsight at the Computer History Museum in Mountain View, California. This example does not have the associated autopilot attached …   Wikipedia

• Compass — This article is about the direction finding instrument used in navigation. For other uses, see Compass (disambiguation). A simple dry magnetic pocket compass …   Wikipedia

• Kilogram — Kg redirects here. For other uses, see Kg (disambiguation). Kilogram A computer generated image of the international prototype kilogram (IPK). The IPK is the kilogram. The IPK, which is roughly the size of a golf ball, sits here alongside a ruler …   Wikipedia

• Optimus Prime — is a fictional character from the Transformers franchise. Prime is the leader of the autobots, a faction of transforming robots from the planet Cybertron. The autobots are constantly waging war against a rival faction of transforming robots… …   Wikipedia

• Navigation — This article is about determination of position and direction on or above the surface of the earth. For other uses, see Navigation (disambiguation). Table of geography, hydrography, and navigation, from the 1728 Cyclopaedia. Navigation is the… …   Wikipedia

• Mathematical discussion of rangekeeping — In naval gunnery, when long range guns became available, an enemy ship would move some distance after the shells were fired. It became necessary to figure out where the enemy ship, the target, was going to be when the shells arrived. The process… …   Wikipedia