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stealth technology

(Encyclopedia)stealth technology, designs and materials engineered for the military purpose of avoiding detection by radar or any other electronic system. Stealth, or antidetection, technology is applied to vehicle...

airship

(Encyclopedia)airship, an aircraft that consists of a cigar-shaped gas bag, or envelope, filled with a lighter-than-air gas to provide lift, a propulsion system, a steering mechanism, and a gondola accommodating pa...

magnetic levitation

(Encyclopedia)magnetic levitation or maglev măgˈlĕv [key], support and often propulsion of objects or vehicles by the use of magnets. The magnets used in magnetic levitation suspend an object free of contact wit...

propeller

(Encyclopedia)propeller, device consisting of a hub with one or more blades that propels a craft to which it is attached by rotating its blades in a fluid such as air or water. In the latter part of the 1830s the S...

motorboating

(Encyclopedia)motorboating, sport of navigating a motor-powered vessel on the water. It is done on either fresh- or saltwater and may be competitive or recreational. The first successful motorboat traveled (1887) a...

pile

(Encyclopedia)pile, post of timber, steel, or concrete used to support a structure. Vertical piles, or bearing piles, the most common form, are generally needed for the foundations of bridges, docks, piers, and bui...

space science

(Encyclopedia)space science, body of scientific knowledge as it relates to space exploration; it is sometimes also called astronautics. Space science draws on the conventional sciences of physics, chemistry, biolog...

air forces

(Encyclopedia)air forces, those portions of a nation's military organization employing heavier-than-air aircraft for reconnaissance, support of ground troops, aerial combat, and bombing of enemy lines of communicat...

water bug

(Encyclopedia)water bug, name for a large number of water-living bugs, comprising several families of the order Hemiptera (true bugs). All have jointed, sharp, sucking beaks, breathe air, and undergo gradual metamo...

Morristown

(Encyclopedia)Morristown. 1 Town (1990 pop. 16,189), seat of Morris co., N N.J., on the Whippany River; settled c.1710, inc. 1865. Although chiefly residential, it has diverse manufactures, including electronic pro...