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Air operations in the Antarctic known as Operation Highjump ended. From December 24. 1946, Navy PBM's and R4D's logged 650 hours in photographic mapping of 1,500,000 square miles of the interior and 5,560 miles of the coastline, the equivalent of about half the area of the United States and its entire coastline.

First four-engine jet bomber, the XB-45 built by North American, made first test flight at Muroc, Calif., with George Krebs as pilot. Its engines were arranged in pairs in single nacelles in each wing.

USN V-2 missile V-2 flight from White Sands Proving Ground WSPG took first photograph at 100-mile altitude.

First test flights of plastic balloons conducted by General Mills at Minneapolis, Minn. for ONR Project Helios. AAF transferred facilities for testing guided missiles from Wendover Field in Utah and Tonopah in Nevada, to Alamogordo Field (subsequently renamed Holloman AFB in New Mexico. Kenneth Gatland chairman of the CBAS and now co-founder of the renewed BIS continues his summary ...

First flight of Douglas D-558-I research airplane successful, Gene May, Duglas test pilot, as pilot. Airplane developed was a Navy- National Advisory Committee for Aeronautics NACA project and three were built.

French Government established rocket test range at Colomb Bechar. Algeria.

Standard system of designating guided missiles and assigning popular names was adopted by the Army and Navy. Basic designation adopted was two letter combination of the three letters A (Air), S (Surface), U (Underwater), the first letter indicating origin of missile, the second letter its objective to be followed by the letter "M" for missile. Thus a surface-to-air missile was designated "SAM."

National Advisory Committee for Aeronautics NACA Langley's PARD launched its first rocket-propelled model of a complete airplane for performance evaluation (AF XF-91), at Wallops Island. This was followed by flight tests of models of practically all Air Force and Navy supersonic airplanes.

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 ...

National Advisory Committee for Aeronautics NACA Langley Laboratory demonstrated practically noiseless airplane with five bladed propellor and muffled exhaust. Walter Dornberger accompanied by Lt.Col. Seashore and Lt Col Edmund Tilley, look for a tin box filled with documents from Peenemunde hidden at Oberjoch. Somebody had removed it.

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