Increase latitude, north pole is pulling down more than south pole. Aeroplane General Knowledge and Aerodynamics, Aviation Theory Center, 2004. copyrightDate(); // These errors are, of course, manageable, with common corrective measures, but an gyroscopic instrument referred to as the heading indicator has been incorporated into most aircraft to minimize reliance on the compass. Magnetic dip, dip angle, or magnetic inclination is the angle made with the horizontal by the Earth's magnetic field lines. If you wish to contribute or participate in the discussions about articles you are invited to join SKYbrary as a registered user. 20° for 330 and 030, 10° for 300 and 060. In a typical gyromagnetic compass system, the magnetic heading of an aircraft is based upon horizontal component of the magnetic field measured by a detector usually located in the wing tip away from metallic objects that cause distortions to the magnetic field. Turbulence is not a real error. In more practical terms, magnetic variation, more often referred to as declination in non-aviation / non-nautical contexts, is the angle on the horizontal plane between magnetic north and true north. document.write(year) // When the aircraft makes a turn from a heading of north, the compass briefly indicates a turn in the opposite direction. Photo Credit: Windell Osk. Increase latitude, north pole is pulling down more than south pole. Then, as the aircraft heading approaches North again, the compass lags. But the construction of the magnet is such that they are below the pivot point and residual dip is reduced to about 3°. Save my name, email, and website in this browser for the next time I comment. This second part discusses the errors the compass is subject to and these should be familiar to the pilot. Variation: caused by the difference in the physical location of the magnetic north pole and the geographic north pole. Some other definitions: lines of equal variation are called isogonic and were the variation is zero it is called an agonic line. The magnetic compass of an aircraft is one of the most primitive and sensitive instruments available in the cockpit of an airplane. Since the airplane is neither trying to accelerate nor trying to climb, the forces of lift, weight, thrust, and drag cancel one another out, thus enabling the plane to maintain a state of equilibrium. As the aircraft heading passes through West, the compass should approximate the correct heading. { // 2. The magnetic compass of an aircraft consists of a float, fixed to a bar magnet. We respect your decision to use an ad blocker, but remember: ads keep the site free of any paid solution.

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