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Arthur C. Clarke writing to his friend Sam Youd tells him he has had to take leave from his government job to be able to handle the work on the Bulletin of the British Interplanetary Society .

French employed first air-to-air combat rockets, four Le Prieur rockets attached to each strut of Nieuport fighter, credited with downing of German hydrogen-inflated Zeppelin LC-77. The Belgian, Willy Coppens and Briton, Albert Bail, reportedly used rockets effectively against German balloons until incendiary bullets were developed.

Curtiss 18-T two-place lighter powered by a Curtiss-Kirkham K-12-350, made first flights, reached speed of 162 mph.

Central Committee for the Study of Rocket Propulsion established in the Soviet Union.

Oleo landing gear tested by Navy on NB-1 at Seattle.

The National Advisory Committee for Aeronautics NACA analysis of basic aeronautical legislation was accepted by Joint Senate-House conferees, leading to the Air Commerce Act of May 20, 1920. This freed National Advisory Committee for Aeronautics NACA of responsibility for regulation of civil aviation and permitted it to concentrate upon the conduct of aeronautical research.

Raktenflugplatz in Germany was visited by Mr. and Mrs. G. Edward Pendray as official representatives of the American Interplanetary Society , who upon their return organized the experimental program of the society. Secretary of the American Interplanetary Society , Charles P. Mason makes an appeal for new members in the pages of Hugo Gernsback 's magazine Science Wonder ...

Aberdeen Proving Ground wind-tunnel tests of sweptback wing at Mach 1.72 carried out on the suggestion of Theodore von Karman . Kenneth Gatland chairman of the CBAS continues his summary of rocket propulsion in Practical Mechanics magazine.

First Deacon rocket launched at Wallops Island, which achieved a velocity of 4,200 feet per second. "The Barrier" by Philip Ellaby Cleator , founder of the British Interplanetary Society appears in ''Fantasy'' magazine. Kenneth Gatland chairman of the CBAS and now co-founder of the renewed BIS continues his summary of rocket propulsion in Practical Mechanics magazine. In ...

DOD directed Research and Development Board to determine whether Air Force with 39 different aircraft types ordered in 1953 procurement program, and the Navy with 27 different types, were operating too many different types of aircraft.

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