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This is the year of what is universally being called the Air and Space Bicentennial, symbolized by our cover photos showing lift-off of a Montgolfière in September 1783 and a Space Shuttle in…

Studies are under way at Bell Helicopter Textron for possible development of a large tilt-rotor V/STOL aircraft. (Teamed with Boeing, the firm already is developing a large version of this V/STOL…

Studies are under way at Bell Helicopter Textron for possible development of a large tilt-rotor V/STOL aircraft. (Teamed with Boeing, the firm already is developing a large version of this V/STOL…

Studies are under way at Bell Helicopter Textron for possible development of a large tilt-rotor V/STOL aircraft. (Teamed with Boeing, the firm already is developing a large version of this V/STOL…

Wideband conical antennas such as this one are widely used in ground-air communications for omnidirectional HF transmission and reception. A special system using such an antenna was designed and…

Wideband conical antennas such as this one are widely used in ground-air communications for omnidirectional HF transmission and reception. A special system using such an antenna was designed and…

Wideband conical antennas such as this one are widely used in ground-air communications for omnidirectional HF transmission and reception. A special system using such an antenna was designed and…

Wideband conical antennas such as this one are widely used in ground-air communications for omnidirectional HF transmission and reception. A special system using such an antenna was designed and…

Wideband conical antennas such as this one are widely used in ground-air communications for omnidirectional HF transmission and reception. A special system using such an antenna was designed and…

Wideband conical antennas such as this one are widely used in ground-air communications for omnidirectional HF transmission and reception. A special system using such an antenna was designed and…