February 1, 1920

February 1, 1920

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The Paris Aeronautical Exposition

Factors Affecting the Warping of Plywood

By Armin Elmendorf9 min

Effects of Wind Upon the Stability and Maneuverability of an Airplane in Flight

By Temple N. Joyce7 min

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1213

The Paris Aeronautical Exposition

Through the courtesy of The Aeroplane, of London, we are enabled to give our readers the following illustrated description of the Paris Aeronautical Exposition. As many of the machines exhibited, such as the Farnmn Goliath, the Bréguet and Voisin bombers, etc., and most of the British airplanes are well known to our readers, their description has been omitted.
2627

Factors Affecting the Warping of Plywood

The warping of plywood panels is a matter of considerable concern to manufacturers who make panels for airplane use where large flat surfaces are desired. Experience and numerous tests made at the Forest Products Laboratory of the United States Forest Service, Madison, Wis., for the Army and Navy have shown that many factors may contribute to the distortion.

By Armin Elmendorf9 min

1819

Effects of Wind Upon the Stability and Maneuverability of an Airplane in Flight

Ever since the beginning of aviation the question as to whether wind has any effect on the stability and maneuverability of a plane has come up from time to time and has been argued both pro and con by experienced and inexperienced pilots. One group of flyers contend that the stability of a plane is affected when banking into or with the wind and that precautions must be taken in order to avoid a fatal fall, particularly when close to the ground.

By Temple N. Joyce7 min

1617

Some Foreign Aerodynamic Propeller Balances

In a recent issue of Engineering (London) William Knight gives a detailed account of the aerodynamic balance used in the St. Cyr Aerodynamic Institute for testing model propellers, together with some interesting information of the Crocco balance used for the same purpose by the Instituto Centrale Aeronautico, at Rome.
2223

Some Recent German Airplanes

Our Danish correspondent has sent us in a fresh set of photographs of German machines all of which were exhibited at the Scandinavian Aero Show in Copenhagen. Figs. 1 and 2 illustrate the Kondor D. VI single seater fighter, in which a special effort has been made to secure vision upwards by splitting the upper plane of the biplane at the fuselage.
1617

Railroad Helium Repurification Plant

During the war one of the greatest military assets obtained by the Allies was the production of helium in quantities sufficiently great for use in balloons and airships. While none actually reached the front, a supply was in transit and continuously increasing production assured.
2425

Aeromarine Eight Cylinder B Type Motor

This motor was primarily designed to include the greatest amount of power possible within the smallest possible overall dimensions; and, as will be noted of the installation diagram, the motor is almost unbelievably small for its horsepower capacity.

By W. C. Bauer5 min

89

Editorials

RECENT performances of airships serve to emphasize the peculiar adaptability of lighterthan-air craft for extended voyages. Thus the R-34 twice crossed the Atlantic with a crew of thirty men, one of the passages being made from East to West, that is, against strong head winds—a performance which no heavier-than-air craft has so far succeeded in achieving.
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Book Reviews

LES AVIONS ALLEMANDS. By Jean Lagorgette. (E. Blondel de la Rougery, Paris. 214 pp., fully illustrated.) M. Lagorgette has reproduced in book form the extremely interesting series of articles on German airplane construction which he published in L’Aerophile during the war.
1415

New Fiat Airplane and Engine

Two new Fiat products were exhibited at the recent Paris Aeronautical Exposition. One of these is a development of the high speed long range bomber which Fiat produced near the end of the war and which has since been modified for commercial work, while the other is a radial water-cooled 9-cyl. airplane engine.
JANUARY 151920 FEBRUARY 151920