March 9, 1925

March 9, 1925

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Stability and Controllability of Airplanes

By B. V. KORVIN-KROUKOVSKY

Helium and its Value for Airships

By PAUL W. LITCHFIELD

AIRPORTS AND AIRWAYS

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Stability and Controllability of Airplanes

Part I—Longitudinal Stability and Controllability

By B. V. KORVIN-KROUKOVSKY

272273

Helium and its Value for Airships

Helium is a non-combustible gas found in natural gas in quantities as high as approximately two per cent in volume. While there are traces of helium in all natural gas, it is now thought that the southwestern United States oil fields are the only worth-while wells so fax known to exist, and by virtue of this fact the United States has a monopoly on helium.

By PAUL W. LITCHFIELD

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AIRPORTS AND AIRWAYS

From the Airways Section, O.C.A.S.: Maynard Field, Winston-Salem, N. C., is no longer suitable for landing. There is a field 2 mi. south of the city which can be used. An Aeronautical Bulletin on this facility will be issued at a later date. The Washburn-Crosby Co. has erected a 500,000,000 candle-power Sperry beacon on top of its Gold Medal Flour receiving station, 200 ft. high, at Minneapolis.
270271

Progress of Air Transport in Europe

Total Traffic of Six Years Aggregates Over 25,000 Tons
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UNITED STATES AIR FORCES

U. S. ARMY AIR SERVICE

Much interest was manifested in the attempts to restore the hearing of Joseph Kling by an airplane flight at Mitchel Field, L. I., New York. Mr. Kling’s case is still under observation and, while he reports a slight improvement, nothing conclusive has been accomplished.
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UNITED STATES AIR FORCES

U. S. NAVAL AVIATION

The U. S. airship Los Angeles left Lakehurst at 3.40 p. m. on Feb. 20 for Bermuda carrying the first international air mail to leave this country. The ship was under the command of Capt. George W. Steele and carried an all-American crew. She carried as passengers Assistant Secretary of the Navy, Douglas Robinson, Rear Admiral W. A. Moffett, Chief of the Naval Bureau of Aeronautics, Capt. L. E. Lyons of the same bureau and Capt. Robert Ghormley, aide to Secretary Robinson.
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Editorials

The Issues Joined

268269

Resolutions to Protect Mitchell

264265
Editorials

60% Army—40% Navy Air Service

268269

An Interesting Photoplane

March 21925 March 161925