May 15, 1918

May 15, 1918

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International Aircraft Standards

By E. A. SHEPARD19 min

Theory of the Airscrew

By Professor Georges de Bothezat19 min

News of the Fortnight

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532533

International Aircraft Standards

General.—1. The general specifications 1G1 shall form, according to their applicability, a part of these specifications. COMPOSITION AND GENERAL PROPERTIES.— 2. The material shall be the best long oil varnish, suitable for application on wood, “doped” linen or cotton, and metal, and must be resistant to air, light, water, and to washing with warm soap water.

By E. A. SHEPARD19 min

518519

Theory of the Airscrew

AVIATION AND AERONAUTICAL ENGINEERING takes this opportunity of presenting to its readers a general outline of the results obtained by Professor Georges de Bothezat, late of the Polytechnic Institute of Petrograd, in his investigations of the mechanics of the airserew. The results of these investigations, which are set forth in the form, of a new theory of the airscrew, constitute a worthy scientific achievement which promises to have a marked influence upon this branch of aeronautical engineering both in the matter of primary conception and technique.

By Professor Georges de Bothezat19 min

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News of the Fortnight

What will be welcome news to the thousands of inventors, who have endeavored in vain to have their ideas considered by the War and Navy Departments, is that an Inventions Section has been established at the Army War College, Washington, D. C., and that a staff of experts will be in session there daily to consider and pass upon the merits of inventions of a military nature which are of possible value to the Army.
534535

Digest of the Foreign Aeronautical Press

The British Flying Services in 1917—In the War Cabinet Report 1917 the following reference to the expansion and work of the British Flying Services during 1917 is of interest: The Royal Naval Air Service at the outbreak of war possessed a personnel of under 800; at the present moment the numbers approach 46,000 and are continually increasing.
528529

The Internal Combustion Turbine

The advantages that would be derived from the development of the internal-combustion turbine for aircraft work can be appreciated from the fact that a purely rotary motion would then be available for these machines, and all reciprocating parts with their consequent vibration be eliminated.
524525

Some Problems of Airplane Design

In this Era of Aviation when we are needing and building thousands of airplanes, there have come into the field many so-called airplane designers and aeronautical engineers. The experience of these men has been mostly perfunctory, if any, and they are constantly arriving at some conclusion or design which the past experience has proven inadequate or incapable of standing up under hard usage and actual flight conditions.

By B. Russell Shaw8 min

536537

The Aircraft Situation

Very little as to the plans of the War Department has been made known since the appointment of John D. Ryan as Director of Aircraft and of Gen. William L. Kenly as chief of the Division of Military Aeronautics, Aviation Section, Signal Corps.
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The Model C.V Albatros Biplane

The upper planes are attached, as in nearly all German machines, to a four-legged cabane. In addition to supporting the wings the cabane of the Albatros carries the radiator, which is of the same shape as the wing section and which fits into an opening in the wing.
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The Evolution of the Airplane—concluded

The Henry Farman of 1913 In the Henry Farman of 1913 we find the “pusher” design crystallizing into its ultimate form. The whole machine has become neater and more compact. The nacelle shelters the pilot reasonably well. The tail, elevator, and rudder form an

By C. G. Grey5 min

530531

An American Pioneer Design

The contention is often made that the manifold difficulties attendant upon the creation of an American air fleet have to some extent been due to the lack of original thought in American airplane design. While this opinion was perhaps justified in some cases, it should nevertheless be considered that before this country entered the great war, there was no incentive, because of small Army and Navy appropriations and lack of sporting interest, to develop original types of machines.
May 11918 JUNE 11918