December 12, 1921

December 12, 1921

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Tests of the 450 Hp. Bristol Jupiter Engine

Semirigid versus Rigid Airships

By Umberto Nobile

The Question of Tandem Propellers

By A. Lapresle

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More Features
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Tests of the 450 Hp. Bristol Jupiter Engine

The fact that the Bristol Jupiter aero engine has passed the British Air Ministry (March 1920) type test marks an epoch in the development of the air-cooled radial aero engine. Only two makes of engine, and these both water-cooled, have previously satisfied the rigid conditions laid down for this test.
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Semirigid versus Rigid Airships

In connection with the first trial flight of the U. S. Army airship Roma, which took place on Nov. 15 at Langley Field, the following presentation of the advantages of the Italian semi-rigid type by Signor Nobile are of interest. Signor Nobile is with Celestino Usuelli and V. Prassone the co-designers of the Italian T type of airship, the first specimen of which is the Roma.

By Umberto Nobile

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The Question of Tandem Propellers

The question of tandem propellers has not yet been approached from the theoretical viewpoint, and considerable incertitude existed with regard to their functioning until, in 1919, M. Eiffel began a series of systematic experiments.

By A. Lapresle

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Parachutes and Life Packs

By Floyd Smith

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Distribution of Load over Wing Tips and Stress Analysis

It is a well known fact, that load per inch run of a wing drops off in proximity of wing tip. The necessity of taking this drop into account in strength computations was recognized long ago, and several approximate methods were in use. Study of pressure distribution along model wings was made by the National Physical Laboratory, and led to the conclusion, that distribution of the load over a wing tip is practically independent of the plan form of the tip.

By B. V. Korvin-Kroukovsky

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Foreign Aeronautical News

Prague is slowly but surely becoming an air port of some importance, a position to which her geographical situation would appear to entitle her. The airdrome is situated at Kbley, a small village on a plateau to the northeast of Prague, forming a splendid natural site for an airdrome.
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The Safety of American Civil Aviation

The very interesting study of civil aviation recently published by The National Bank of Commerce in New York brings home the painful absence in this country of statistics on eivil aerial activities, save for the record kept by the government of the operations of its Air Mail Service.

By Otto Praeger

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The Chamberlin-Standard H5 Five-Seater

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Lectures on Commercial Aviation

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Air Service Develops Radio Controlled Automobile

December 51921 December 191921