In Partnership With

September 1, 1919

Airship Engineering Progress in the United States

Airplane Engine Vibration

Course in Aerodynamics and Airplane Design

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Airship Engineering Progress in the United States

Commander, Construction Corps, V. S. Navy The B class ships had envelopes made of doubled fabric, with the threads of the “ bias ply ” at 45 deg. to the threads of the other. The bias ply is necessary to prevent tearing, but is rather uncertain in strength.

118119

Airplane Engine Vibration

One of the essential features of an airplane engine is smoothness of running. This is obviously true of any type of internal combustion engine; but the degree of unevenness allowable, in every case, depends mainly upon the rigidity and absorbing qualities of the engine mounting.

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Course in Aerodynamics and Airplane Design

Part III.—Experimental Aeronautical Engineering

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The Licensing of Aeronautical Engineers and the Inspection of Aircraft

The following article contains many interesting suggestions; but, while there is no doubt that pilots should be licensed for civilian flying, there would seem to be a difficulty in the question of licensing aeronautical engineers, and there is no precedent in any other branch of engineering for such licensing.

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The Van Sicklen Chronometrie Tachometer

There are many types of speed measuring devices, which operate upon nearly as many different principles. Some of these have been quite successfully used as automobile speedometers, but on account of the extreme conditions encountered in airplane practice, most of these instruments were not satisfactory, for this use.

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Reducing Shrinkage and Swelling in Laminated Wood Construction

One of the results of the enormous and unprecedented demand upon our timber resources during the war was the development of new methods of utilizing more efficiently the available supply of timber, among them the development of the use of small pieces of wood glued together and then machined or cut to any form.

122123

Report of Aviation Mission

Concentration of the air activities of the United States— military, naval, and civilian—within the direction of a single Governmental ageney created for the purpose, co-equal in importance with the Departments of War, Navy, and Commerce, is the recommendation of the American Air Mission, headed by Assistant Secretary of War Crowell, which returned on July 20 from Europe after an extensive study of European air establishments.
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Prediction of Airplane Performance

Aeronautical Engineer, U. S. Air Service The following method of estimating airplane performance was outlined to the author by Lieutenant Alkan of the French Aviation Mission. It consists in comparing the airplane whose performance is to be found with the actual performance of an airplane of similar type on a power and a surface loading basis.

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The Trompenburg Pursuit Airplane

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Editorials

Editorials

August 151919 September 151919