September 1, 1917

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The World's Air Routes and Their Regulation*

Unless we are to have lawlessness and anarchy in the regions of the air there must be efficient control—this is an axiom of efficiency and civilization. Control of the levels can only be exercized, nationally and internationally, by police pilots on fast planes above the ordinary traffic, where, with the forces of gravity to aid, they can descend with a superior swiftness upon malefactors and breakers of the laws of the air, take their numbers or compel them to alight at the nearest landing place or drome.

By Col. Lord Montagu of Beaulieu17 min

164

Aviation Engines with Particular Reference to Benz and Mercedes Types

It was my good fortune to secure from the Baron Charles Huard two engines from airplanes which were shot down in France during the last year. These engines I have had dismantled, and am now able to give full particulars of the 170 h.p. Benz and one of the Mercedes type, which is a twin-six, and which was probably built by Renault.

By E. H. Sherbondy16 min

160

Controls and Control Surfaces

In the present article it is attempted to cover briefly the details of control surfaces from a structural point of view only, since much valuable information has previously been published on the aerodynamic properties of sections adapted to their use.

By W. J. Waterhouse13 min

180

News of the Fortnight

Glenn L. Martin, the airplane pioneer of Los Angeles, Cal., and late vice-president of the Wright-Martin Aircraft Corporation of New York City, has just organized a company for the manufacture of aircraft at Cleveland, Ohio.

178

Digest of the Foreign Aeronautical Press

On Aerial Warfare.—Captain Herrera, of the Spanish Army, who was recently given an opportunity to visit the French and British air fleets on the Western front, gives the following details on the aircraft he was permitted to examine: The fighting airplanes of both the French and the British are, as a rule, small one-seater tractor biplanes in which the functions of the pilot coincide with those of a gunner.

168

The Economical Arrangement of Dry Kilns*

The selection of a dry kiln for any plant involves a number of considerations and usually results in a compromise between the ideal from a kiln standpoint and the plant owner's desires. In order to simplify the compromise and promote better efficiency the following suggestions are offered to aircraft manufacturers relative the installation of dry kilns.

By Thomas D. Perry7 min

164

Comparative Tests of Wing Sections

In AVIATION AND AERONAUTICAL ENGINEERING for April 15, 1917, were given the results of tests on six U. S. A. wing sections. In view of the variations in efficiency with size of model and wind velocity, no true comparison can be made between such sections and others in common use unless the tests are all made on the same size of model and at the same wind speed.

By Alexander Klemin,G. M. Denkinger4 min

August 151917

September 151917

September 1, 1917

September 1, 1917