Aerial Age Volume 6

Aerial Age Volume 6

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 edition. Excerpt: ...by the angle of roll; rotation about the Z axis is termed the yawing moment and is measured by the angle of yaw; and rotation about the Y axis is called the pitching moment and is measured by the angle of pitch. Forces are positive when acting along the positive directions of the axes, angles and moments are positive when turning occurs or tends to occur from OY to OZ, OZ to OX, and OX to OY. (See Fig. I.) In this work all bodies are drawn to face the left so that all'positive movement will rotate clockwise. Method of Procedure In carrying out the design for stability to a successful achievement, recourse must be had to results of tests made on models, whether on parts of aeroplanes or on the complete aeroplane. If a test on a model of a complete machine cannot be had, it will be necessary to calculate the effect each part of a machine will have on the final equilibrium of the complete aeroplane. a The initial step to the acquirement of stability by the method of mathematical calculations will be explained first, so that a clearer conception may be had of the action of the forces that act upon the aeroplane, and the importance of their point of application for ensuring stable flight. For a preliminary design this method is the best, as it permits of greater freedom in bringing the various forces to act at their proper position. After having made the above calculations, a complete model may be constructed and a thorough test made. Then, if any defect arises, a knowledge of the fundamentals of equilibrium will assist greatly in making suitable corrections. It is to be frankly admitted that too much reliance on the results of these wind tunnel tests should not be placed, as the actual flying done by the aeroplane in free space cannot be compared...show more

Product details

  • Paperback | 624 pages
  • 189 x 246 x 32mm | 1,098g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236560795
  • 9781236560797