In Partnership With

May 1, 1918

The Evolution of the Airplane*

Reorganization of the Army Air Service

The Gallaudet Airscrew Propulsion Described

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The Evolution of the Airplane*

Although the first human flight on a power-driven airplane, free from control on the ground, was made by Orville Wright on December 17, 1903, it was not until 1908 that the airplane, as a more or less consistently navigable vehicle, really being. Consequently, in dealing with the development of the airplane that year must be taken as the startingpoint.

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Reorganization of the Army Air Service

Henceforth John D. Ryan of Montana and New York will direct the production of aircraft for the United States Army, and will serve as chairman of the Aircraft Board. Mr. Ryan was called to Washington on Tuesday, April 23, and notified that he had been selected.
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The Gallaudet Airscrew Propulsion Described

The system of airscrew propulsion herewith described is the invention of Edson F. Gallaudet of Norwich, Conn., who is known as a pioneer aviator and airplane constructor. It purposes to make possible the construction of airplanes fitted with a pusher airscrew without having recourse to the attachment of the tail planes by means of outriggers, or tail booms, the presence of which generates a not inconsiderable amount of parasite resistance.
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The Model C.V Albatros Biplane*—Continued

It has been said before that the Albatros biplane belongs to the German C-class, that is to say, is a general utility machine variously used for fighting, reconnaissance, artillery spotting and photography, and is therefore not to be considered a bombing machine.
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Digest of the Foreign Aeronautical Press

The Sopwith Triplane—The following description of the Sopwith fighting triplane appeared in the German aviation magazine Flugsport: The body with tail plane and rudder is the same as that of the small Sopwith single-seater biplanes. The three wings have a span of 8.07 m. and a chord of 1 m.
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News of the Fortnight

Completion of arrangements for the first aerial mail route to be established in the United States, and plans as to train connections for saving of time in the dispatch and delivery of mail matter are announced in a statement just issued by the Post Offiee Department.
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The Effect of an Airplane Rudder in Flight

The object of this article is to find the moments about the center of gravity of airplanes of different lengths, caused from a rudder of different aspect ratios under varying angles of deviation; the results being shown by curves. The following definitions should be understood before proceeding further:

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The Progress of Aviation in South America

The accompanying illustrations show various phases of the aviation activities of the Argentine Republic. The picture at the top shows part of the training squadron of the military school El Palomar, while the lower picture shows a Rumpler Taube that was imported prior to the war from Germany.
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Book Review

MILITARY AEROPLANES. 1918 Edition. By Grover C. Loening, B.Sc., A.M., C.E. ($4.75. 202 pp., fully illustrated.) “ Military Aeroplanes,” by the author of “ Monoplanes and Biplanes,” is known to every serious student of aviation as one of the classics that grace the aircraft literature, and without which no aeronautical library may be said to be complete.
April 151918 May 151918