September 15, 1920

September 15, 1920

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Properties of Special Types of Radiators

By S. R. Parsons19 min

Safety in Flight

Aeromarine Model 40 Hull Test

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More Features
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Properties of Special Types of Radiators

In respect to the relation of power absorbed to power dissipated, flat plate radiators have been found to be markedly superior to other types commonly employed, for use in unobstructed positions on airplanes flying at the higher speeds.

By S. R. Parsons19 min

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Safety in Flight

Comparatively brief though the period of post-war civil aviation has been, it has taught many valuable lessons, and has sufficed to demonstrate that, as far as safety is concerned, flying may be placed on an equal footing with any method of transport involving high speed.
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Aeromarine Model 40 Hull Test

The tests were made in accordance with instructions received from the Bureau of Construction and Repair and are inserted in the appendix of this report. To simulate flying condition the hull was suspended by means of the flying wires attached to the hull and the whole arrangement constructed so that the hull would be balanced at the center of pressure for low speed.
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The Design of Monocoque Fuselages

In airplane evolutions involving turning about a horizontal lateral axis the flexure stresses are a maximum in the upper and lower surfaces of the fuselage and the shear stresses are a maximum along the neutral or mid-section where the flexural stresses are zero.

By Armin Elmendorf12 min

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Editorials

The spanning of the American continent by the extension of the New York-Omaha air mail route to San Francisco may truly be said to mark the commencement of a new era in the rapid transportation of mails. By this service the air mail will daily advance 400 lb. of mail 42 hr. into San Francisco, which performance cuts the train time between the Atlantic and the Pacific coasts nearly in half.
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A New High Performance Wing

A novel form of airplane wing, which appears to go a long way toward improving the economy of commercial flight, has just been introduced in England under the name of Alula wing. The aerodynamic data and the outline of the new wing are given below.
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The Laird “Swallow”

A consideration of the present cost of operations of commercial aircraft, as well as of the airdrome conditions throughout the country shows that the successful commercial airplane must be one which will have a thorougly reliable engine with a minimum of upkeep costs.
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N. A. C. A. Reports

NOMENCLATURE FOR AERONAUTICS. Synopsis of Report No. 91, National Advisory Committee for Aeronautics. This nomenclature and list of symbols were approved by the Executive Committee of the National Advisory Committee for Aeronautics, for publication as a technical report on April 1, 1920, on recommendation of the Subcommittee on Aerodynamics.
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Trade Reviews

COMPENDIUM OF AIRCRAFT EQUIPMENT. (96 pp. with many illustrations, prepared by Brown Brothers, Ltd., London, Eng.) While this catalogue of aircraft and aerodrome equipment constitutes a trade publication, it is surprisingly well got up and is extremely valuable.
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Book Review

AEROPLANE DESIGN. S. T. G. Andrews and S. F. Benson (454 pp.) E. P. Dutton & Co. In this book, which undertakes to cover the whole field of airplane design, there are parts which are good and others not so good, reflecting perhaps the experience of the authors in each department of the subject.
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