Flying Machines: Construction and Operations: A Practical Book which Shows, in Illustrations, Working Plans and Text, how to Build and Navigate the Modern Airship

Charles C. Thompson Company, 1912 - Airplanes - 256 pages

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Page 188 - which brings the case into the category of rising wind effects. But the bird was observed to have a negative angle to the horizon of about 3°, as near as could be guessed, so that his angle of incidence to the "relative wind" was reduced to 16° 26'. The relative speed of his soaring was therefore: Velocity
Page 36 - inch in diameter and rounded in form so as to offer as little resistance as possible to the wind. The struts, there are twelve of them, are 3 feet long by
Page 189 - -f 6~ = 18.03 miles per hour. At this speed, using the Langley co-efficient recently practically confirmed by the accurate experiments of Mr. Eiffel, the air pressure would be: i8.O3 2 X 0.00327 = 1.063 pounds per square foot. If we apply Lilienthal's co-efficients for an angle of 16° 26', we have for the force in action: Normal: 4.57 X 1.063 X 0.912 = 4.42 pounds. Tangential: 4.57 X
Page 110 - feet deep. The front double surface horizontal rudder is 6x2 feet, with an area of 24 square feet. To the rear of the main planes is a single surface horizontal plane 6x2 feet, with an area of 12 square feet. In connection with this is a vertical rudder
Page 62 - 2 ft. deep. This, for the two planes, gives a total surface area of 538 square feet, inclusive of auxiliary planes. This sustains the engine equipment, operator, etc., a total weight officially announced at 1,070 pounds. It shows a lifting capacity of about two pounds to the square foot of plane surface, as against a lifting capacity of about
Page 215 - 1910, participated in by William Wright and Andrew Freedman, representing the Wright Co., and the Aero Club's committee, of Philip T. Dodge, WW Miller, LL Gillespie, Wm. H. Page and Cortlandt F. Bishop. At this meeting arrangements were made by which the Aero Club recognizes the
Page 104 - 6.6 In giving the depth dimensions the length over all— from the extreme edge of the front auxiliary plane to the extreme tip of the rear is stated. Thus while the dimensions of the main planes of the Wright machine are 41 feet spread by
Page 95 - on lines laid down by him. Santos Dumont wanted a 2-cylinder horizontal motor capable of developing 30 horsepower, and not exceeding 4^ pounds per horsepower in weight. There can be no question as to the ability and skill Propeller and Motor on Voisin Machine.
Page 141 - the balance by shifting weight or ballast. The center of gravity should be lower than the center of the supporting surfaces, but cannot be made much lower. It is a common mistake to assume that complete stability will be secured by hanging the center of gravity very low on the principle of the parachute. An aeroplane depends upon rapid horizontal
Page 192 - a dynamic flying machine weighing about one pound per square foot of area, with stable equilibrium and under perfect control, capable of gliding by gravity at angles of one in ten