Monoplanes and Biplanes, Their Design, Construction and Operation

Εξώφυλλο
Munn, Incorporated, 1911 - 331 σελίδες
 

Άλλες εκδόσεις - Προβολή όλων

Συχνά εμφανιζόμενοι όροι και φράσεις

Δημοφιλή αποσπάσματα

Σελίδα 1 - Sir, said he, you have seen but a small part of what the mechanic sciences can perform. I have been long of opinion, that instead of the tardy conveyance of ships and chariots, man might use the swifter migration of wings ; that the fields of air are open to knowledge, and that only ignorance and idleness need crawl upon the ground.
Σελίδα 316 - ... obtaining it. In order to obtain a Patent it is necessary to employ a Patent Attorney to prepare the specifications and draw the claims. This is a special branch of the legal profession which can only be conducted successfully by experts. For nearly sixty years we have acted as solicitors for thousands of clients in all parts of the world. Our vast experience enables us to prepare and prosecute Patent cases and Trade Marks at a minimum of expense. Our work is of One quality, and the rates are...
Σελίδα 78 - ... variation in size of the different types, detailed and dimensioned plans and elevations of each machine are given. Most of these are drawn to the same scale, thus enabling a direct, graphic comparison of the types. But it must be borne in mind, inasmuch as aviators are constantly changing and rechanging the dimensions of their machines, without recording such alterations, many of the dimensions given here are necessarily approximate. In all cases, however, the most recent and accurate data, as...
Σελίδα 318 - Over 15,QfX) of the most useful formulas and processes, carefully selected from a collection of nearly 150,000, are contained in this most valuable volume, nearly every branch of the useful arts being represented. Never before has such a large collection of really valuable formulas useful to everyone, been offered to the public. The formulas are classified and arranged into chapters containing related subjects, while a complete index, made by professional librarians, renders it easy to find any formula...
Σελίδα 249 - ... rarely exceeding two degrees. Renard, after deductions from the experiments of Borda, Langley, and other investigators, has enunciated the principle that, as the incident angle diminishes, the driving power expended in sustaining a given plane in the air also diminishes.
Σελίδα 162 - Machine in Flight, Showing Ailerons and Position of Operator propeller has a diameter of 6 feet and a pitch of 5 feet. In more recent Curtiss machines, an eight-cylinder, V-type, four-cycle, aircooled motor of 50 horse-power is employed. General. The seat for the aviator is on the framing in front of the main .cell and in line with the motor, Fig. 15. When a passenger is carried, a seat is provided at one side and somewhat below the aviator. The machine runs on three pneumatic-tired wheels, rigidly...
Σελίδα 26 - ... as that of the cosine to the sine of the angle of incidence. But in curved surfaces a very remarkable situation is found. The pressure, instead of being uniformly normal to the chord of the arc, is usually inclined considerably in front of the perpendicular. The result is that the lift is greater and the drift less than if the pressure were normal.
Σελίδα 15 - If in a rare medium, consisting of equal particles freely disposed at equal distances from each other...
Σελίδα 26 - Resolution of Force Diagram for a Curved Plane considerably inclined forward of the perpendicular, with the result that the lift is increased and the drift decreased. He stated it as follows : When a wing with an arched surface is struck by the wind at an angle a with a velocity V, there will be generated a pressure P, which is not normal, but is the resultant of a force N, normal to the chord, and of another force T, tangential to the chord.
Σελίδα 26 - ... perpendicular to the surface and, as already pointed out, the ratio of lift to drift is, therefore, as the cosine to the sine of the angle of incidence. The angle of incidence is the angle at which the plane is inclined to the air current. But in curved surfaces, Fig. 20, as first shown by Lilienthal, the pressure is not uniformly normal to the chord of the arc, but is Fig. 20. Resolution of Force Diagram for a Curved Plane considerably inclined forward of the perpendicular, with the result that...

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