Aerodynamics, Constituting the First Volume of a Complete Work on Aerial Flight, Aerodonetics, Constituting the Second Volume

Aerodynamics, Constituting the First Volume of a Complete Work on Aerial Flight, Aerodonetics, Constituting the Second Volume

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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. 1908 edition. Excerpt: ...this is analogous to the density condition in the case of a boat; it carries with it also the same condition as to the position of the centre oE gravity being similarly situated. In the second place we have the condition that the moment of inertia shall he equal to that of the exact scale model; that is to say, proportional to the fifth power of the linear dimension. This evidently applies not only to the moment of inertia about the transverse axis, as involved in the equation of longitudinal stability, but also about the other coordinate axes; in all cases the moment of inertia is reckoned about an axis passing through the centre of gravity. 133. Scale Model Experiments (continued).--It is evident from the foregoing discussion that before a model can be constructed of any given machine or design, not only must the weight and position of the centre of gravity be known, but also the moment of inertia must he calculated or measured about each of the three co-ordinate axes. In practice, this means that in the originating of a flying machine, the moments of inertia of the component parts should, in the first instance, be separately computed from the initial design, and the moments of inertia of position of these separate components should then be calculated from the location of their centres of gravity relatively to the centre of gravity of the whole machine; the total moments of inertia will then be the sum of the moments of inertia of the component parts as separately computed, and of their moments of inertia as due to their position.1 Having thus ascertained the moment of inertia of the intended design, and having settled the relative scale of the model it is proposed to employ, the moment of inertia of the latter, about each of its three...show more

Product details

  • Paperback | 100 pages
  • 189 x 246 x 5mm | 195g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • Illustrations, black and white
  • 1236634292
  • 9781236634290