May 15, 1920

May 15, 1920

View Full Issue Table of Contents

Characteristics of Design Effecting Production, Operation and Maintenance of Aircraft

By Maj. Percy Bishop25 min

The Lift of Hydrogen

By Squadron Leader11 min

Book Reviews

View Full Issue
More Features
318319

Characteristics of Design Effecting Production, Operation and Maintenance of Aircraft

The advent of the use of aircraft for purposes other than warfare will involve the appearance of several additional aspects into the already numerous considerations which have to be applied during the evolution of the design of an aircraft.

By Maj. Percy Bishop25 min

328329

The Lift of Hydrogen

The term Lift ns applied to airships is equivalent to buoyancy, and like buoyancy, when applied to water-borne ships, it depends on two considerations:— (1) The weight of the ship. (2) The weight of supporting medium displaced by the ship.

By Squadron Leader11 min

326327

Book Reviews

APPLIED AERODYNAMICS By Leonard Bairstow (Longmans, Green and Co. 565 pp. with many illustrations and diagrams.) The publication of Mr. Bairstow’s book constitutes somewhat of an aeronautical event. Mr. Bairstow’s reputation is perhaps, as high as that of any aerodynamicist.
314315

The Avorio-Prassone Kite Balloon

The Avorio-Prassone kite balloon was designed jointly by Major Luigi Avorio, Chief of the Aeronautical Division of the Italian Army, and Dr. Eugenio Prassone, Director of the Stabilimento Construzioni Aeronautiche. It was used extensively for observation purposes in the Italian Army.

By John Jay Ide9 min

324325

The Claudel Carburetor

The Claudel carburetor, widely used in Europe for twenty years, is now made in America by the Claudel Carburetor Co., Long Island City, N. Y. This highly-perfected, plain-tube mixing device was designed by Charles Henri Claudel, the pioneer in the development of the plain-tube type of carburetor, who is recognized as the foremost European authority on carburetion.
316317

Static Pressure Gradients in Wind Tunnel Work

In aerodynamic wind tunnels the air is sucked through the tunnel by a propeller or fan. There must, therefore, be a gradual increase in static pressure along the air stream from propeller to inlet section. By employing the static pressure openings of a Pitot tube, which has been shown to be a very reliable instrument for this purpose, and using a sensitive differential manometer, these pressures can be easily measured at several points along the tunnel, especially in that portion where the models are set up.

By Dr. J. G. Coffin8 min

312313

Editorials

CONSTRUCTORS and designers very often blame the wind tunnel for giving them results which are not in accordance with their tests. In their eyes, the wind tunnel is totally discredited thereby. It is however quite possible that the fault lies not in the wind tunnel, but in the model presented.
330331

N. A. C. A. Reports

CONSTRUCTION OF WIND TUNNEL MODELS. Synopsis of Report No. 74, National Advisory Committee for Aeronautics. This report gives a full description and discussion of the best methods to be employed in constructing models of aircraft and parts thereof for testing in wind tunnels.
322323

Bureau of Mines Bulletin

The Bureau of Mines, Department of the Interior, announces the publication of a bulletin on the methods of testing and specifications for lubricants adopted by the Committee on Standardization of Petroleum Specifications, and effective April 16, 1920.
318319

A Letter

EDITOR, AVIATION AND AERONAUTICAL Engineering:—In AVIATION for April 15, 1920, Dr. J. G. Coffin describes a pressure gauge used in his laboratory which is only a mechanical modification of the one invented by me in the summer of 1918 and described in AVIATION for Nov. 1, 1918.

By A. H. MERRILL1 min

MAY 11920 JUNE 11920