January 15, 1918

Seaplane Float Construction

International Aircraft Standards

Development and Progress in Aviation Engines


Seaplane Float Construction

Deck Edge Stringers.—These are constructed similar to the chine stringers and are fitted to the deck edge of the flat-backs. The materials used in the chine and deck edge stringers are ash, white oak, elm, mahogany. Body Molds.—Where bent frame construction is used it is necessary to construct and erect temporary molds or forms to give the shape of the float.


International Aircraft Standards

3N16—Specifications for Aluminum Alloy-Sheet GENERAL-.—1. The general specifications, 1G1, shall form, according to their applicability, a part of these specifications. MATERIAL.—2. The aluminum alloy of these sheets shall be made from standard No. 1 aluminum conforming to I. A. S. B. specification 2N1.

Development and Progress in Aviation Engines

The art of aviation and the industry of building airplanes, engines, and accessories, to meet the demands of the art, is now going forward with wonderful strides. Commercial usage as well as war usage begins to attract the attention of the aeronautical engineer.


The Metric System

As we know it today, that is, as the French legal standard of weights and measures, the metric system is not the complete scheme as generally proposed. Devised in the troublous years of the Revolution, the intention was to wipe out the divisions of time which belonged to the Christian Era, and to alter the immemorial standard of 360 deg. as the division of the circle.


Theory of Bomb Dropping

When any object such as a bomb is allowed to fall from an aircraft in flight, it will not drop vertically, but its path will be a definite curved line. If the fall took place in a vacuum. the curve would be a parabola. The path, however, is influenced by various factors, particularly the resistance of the air.

The 230 Horsepower Ago Fighting Biplane

As regards its general lines, the Ago fighting biplane is of a strikingly unusual appearance, due mainly to the fact that the wings are tapered very pronouncedly from root to tip. This feature, so unusual in any modern machine, is decidedly disadvantageous from the manufacturing viewpoint, since it entails the separate construction of one half the ribs, no two of which are alike in one wing. The reasons which prompted the designer of the Ago to adopt the tapering wing shape become, however, evident upon examination of the inter-plane bracing system.

Digest of the Foreign Aeronautical Press


News of the Fortnight

Department of Munitions Is Proposed On Jan. 4 Senator George O. Chamberlain, of Oregon, introduced in the Senate a bill (S. 3311) to create a Department of Munitions, and on Jan. 7, Congressman William T. Borland of Missouri introduced a duplicate bill in the House of Representatives.

Book Review

“DYKE’S AUTOMOBILE ENCYCLOPEDIA,” A. L. Dyke, St. Louis. (Sixth Edition, 1918. $3, 900 pp., 3392 ill.) Dyke’s Automobile Encyclopedia is a book well deserving the attention of the aviator and the air mechanic for, although it does not specifically deal with aviation engines it treats the subject of the internal combustion engine in such a comprehensive manner that the working of the stationary aviation engine becomes self-explanatory.

Book Review

THE PRINCIPLES OF AEROGRAPHY. by Prof. Alexander McAdie. (Rand, McNally & Co. $3.00. Pp. 318.) With the large increase in the number of men engaged in the flying of airplanes and dirigible balloons, the science of meteorology has assumed a position of considerable interest and importance.
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