March 15, 1920

March 15, 1920

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General Electric Turbo Supercharger for Airplanes

By Sanford A. Moss21 min

Some Physical and Psychical Effects of Altitude

By Charles Atkin Swan18 min

Impressions of Airplanes at the Show

By Alexander Klemin18 min

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More Features
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General Electric Turbo Supercharger for Airplanes

An airplane flying at high altitude receives air at a comparatively low density. For instance, at 18,000 ft. altitude the density is practically half that at sea level. This means that a given volume contains half as much actual air by weight.

By Sanford A. Moss21 min

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Some Physical and Psychical Effects of Altitude

The paper which is printed herewith is of peculiarly timely interest in connection with Major R. W. Schroeder's altitude flight to 36,000 ft., Feb. 26, last, which establishes a new world’s record. Having reached this altitude. Major Schroeder lost consciousness owing to his oxygen feed tank having become exhausted and dropped to within 2,000 ft. from the ground, when he recovered partial consciousness.

By Charles Atkin Swan18 min

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Impressions of Airplanes at the Show

The show is almost entirely devoted to commercial machines, with almost no exhibits of a military or naval character. It demonstrates conclusively that aeronautics have now entered on a purely commercial phase, and at the same time it gives an excellent opportunity of reviewing the entire field of commercial design.

By Alexander Klemin18 min

152153

Introduction to Propeller Theory

Notation and Definitions—Angle of Incidence or Attack: The angle between the direction of the relative wind and the chord of an aerofoil is indicated by i. The angle between resultant velocity of relative wind and velocity of rotation of an element of the propeller is denoted by A.

By Alexander Klemin11 min

150151

New Aeromarine Control

An improvement in the control system that adds not only to the safety but to the fine appearance of the Aeromarine flying boat has recently been adopted by the Aeromarine Plane and Motor Co. of Keyport, N. J. The new control will be exhibited in use in a limousine flying boat at the New York Aeronautical Show and will appear in all new types of Aeromarines.
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American Airship Pioneers

One hundred years ago, Rufus Porter, an inventor from New York, published in a local scientific journal a memoir on the populsion of balloons which holds an important place in the annals of airship development, although it did not at the time attract the attention it deserved and soon fell into oblivion.
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Editorials

INCREASING popular interest in aircraft is reflected in the decision of the airplane manufacturers to make the New York, Chicago and San Francisco shows permanent national events. The next forward step would be representative outdoor exhibitions in various parts of the country during the seasons of best flying weather.
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Swaged Wire

Swaged wire is nothing but hard wire, threaded at the ends, but together with suitably internally threaded clevises, swaged wire permits a considerable simplification in the assembly of a plane. It permits the omission of turnbuckles, and avoids the always difficult operation of attaching hard wire to a lug.
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Oil Reclamation

There is no doubt that with the present day fuel and oil, all lubricants are largely diluted in use, and the losses caused by dilution are serious, as they mean loss of power and increase in wear. While a great deal may be expected both at the hands of the engine designer and the oil refiner to improve the situation, it is interesting for airplane users to consider that during the war, the Air Service designed and installed, at thirty flying fields, a simple system of reclamation, by which 73 per cent of the used oil was reclaimed, and made available for re-use.
162163

Aero Show at San Francisco

The Aeronautical Show of San Francisco is the third of three national shows given under the auspices of the Manufacturers’ Aircraft Association. The show will be given in the finest show building in America, the Exposition Auditorium, located five minutes’ walk from the business center of San Francisco.
MARCH 11920 APRIL 11920