June 13, 1927

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The Anodic Oxidation Treatment of Duralumin

By LIEUT. COMDR. WM. NELSON13 min

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The Anodic Oxidation Treatment of Duralumin

DURALUMIN as a structural material for aircraft is of little use to the airplane industry unless suitable means for protecting the metal against corrosion are followed. Of the many methods that have been tried, the electro-chemical means has proved to be particularly enticing.

By LIEUT. COMDR. WM. NELSON13 min

1320

AIRPORTS AND AIRWAYS

Moline, Ill.

Moline is geographically situated in the center of a group of four municipalities, all on the banks of the Mississippi river, with a combined population of 175,000. To the north is Davenport, to the west, Rock Island and to the east, East Moline.

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Night Flying Equipment for the Airdrome, IV

Night Flying Equipment for the Airdrome, Iv

IF THE problem of properly lighting a large airdrome or even a small one with numerous obstacles is considered it will be found that it is not advisable to use a parallel distribution system, but to use a series constant current system. The series constant current system has been used extensively for street lighting for some time, but the application to lighting an airdrome was such as to require special consideration and study at McCook Field.

By WILBUR T. HARDING7 min

1290

Bird-Like Design Features Bonney “Seagull”

Bird-like Design Features Bonney “Seagull”

By Reproducing the Same Aerodynamic Characteristics as those of the Gull Leonard W. Bonney Expects to Give his Plane a Similar Performance

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United States Air Forces

There are at present in this country sixteen Federally recognized observation squadrons and photo sections, the organizational scheme being the Division Air Corps consisting of one squadron and one photo section for each of eighteen Infantry divisions.