Aircraft Flight: A description of the physical principles of by D.R. Philpott, R.H. Barnard

By D.R. Philpott, R.H. Barnard

Plane Flight offers actual actual, instead of mathematical, descriptions of the rules of airplane flight. This well known textual content offers mechanical engineering and aeronautical engineering scholars an invaluable creation to the topic. The fourth variation has been up-to-date to incorporate very important fresh advancements comparable to unmanned air cars and the low orbit space-plane

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And von Doenhoff, A. , Theory of wing sections, Dover Publications, New York, 1949. Fay, John, The helicopter: history, piloting and how it flies, 4th edn, David and Charles, Newton Abbot, UK, 1987, ISBN 0715389408. An updated edition of a popular book that gives a good general introduction to the subject of helicopters. , Basic helicopter aerodynamics, 2nd edn, Blackwell, London, 2002, ISBN 9780632052837. QXD 14/9/09 15:20 Page 37 CHAPTER 2 Wings Wing planform The lift and drag produced by a wing of a given cross-sectional profile are dependent on the dynamic pressure, the angle of attack and the wing plan area.

Even if an aircraft is not intended to be flown faster than the speed of sound, the wings may need to be swept, since the air flow may become supersonic locally, particularly on the upper surface, where it is moving faster than the free stream (the approaching flow). This can occur at flight speeds of around 60 to 70 per cent of the speed of sound, and since medium and long-haul airliners nowadays fly faster than this, they invariably have swept wings. The idea of using wing sweep was developed by a group of German engineers including A.

The resultant force is tilted backwards relative to the flight direction, and has a rearward (trailing vortex) drag component with reduced lift due to reduction in the effective angle of attack (c) To restore the lift to its value in two-dimensional flow, the angle of attack must be increased. QXD 14/9/09 15:20 Page 45 THE INFLUENCE OF ASPECT RATIO vicinity of the wing is changed, what was previously the lift force vector, is now tilted backwards relative to the flight direction. There is therefore a rearward drag component of this force.

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