March 15, 1920

General Electric Turbo Supercharger for Airplanes

Some Physical and Psychical Effects of Altitude*

Impressions of Airplanes at the Show

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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.

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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.

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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.

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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.
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New Aeromarine Control

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American Airship Pioneers

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Editorials

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Swaged Wire

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Oil Reclamation

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Aero Show at San Francisco

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