Useful english dictionary. 2012.
Lighter than air — Some gases are buoyant in air because they have densities lower than that of air (about 1.2 kg/m3, 1.2 g/l). Lighter than air gases are used to fill craft called aerostats, which include free balloons, moored balloons, and airships, to make the… … Wikipedia
Air Battalion Royal Engineers — Infobox Military Unit unit name= Air Battalion caption= start date= 1 April 1911 country= United Kingdom allegiance= branch= type= role= size= command structure= Royal Engineers garrison= Farnborough Airfield garrison label= Headquarters… … Wikipedia
Royal Canadian Air Force — The Royal Canadian Air Force (RCAF) was the air force of Canada from 1924 until 1968 when the three branches of the Canadian military were merged into the Canadian Forces. The modern Canadian air force has been known as Canadian Forces Air… … Wikipedia
air-cushion machine — ▪ vehicle Introduction also called ground effect machine, or hovercraft, any of the machines characterized by movement in which a significant portion of the weight is supported by forces arising from air pressures developed around the… … Universalium
Air Jordan — Not to be confused with Jordanian Airlines. The Jumpman logo is used by Nike to promote the Air Jordan brand. Air Jordan(s), also known simply as Jordans, are a brand of shoes and athletic apparel produced by Nike originally designed for and… … Wikipedia
Liquid air cycle engine — A liquid air cycle engine (LACE) is a spacecraft propulsion engine that attempts to gain efficiency by gathering part of its oxidizer from the atmosphere. In a LOX/LH2 bipropellant rocket the liquid oxygen needed for combustion is the majority of … Wikipedia
airplane — /air playn /, n. 1. a heavier than air aircraft kept aloft by the upward thrust exerted by the passing air on its fixed wings and driven by propellers, jet propulsion, etc. 2. any similar heavier than air aircraft, as a glider or helicopter. Also … Universalium
airship — /air ship /, n. a self propelled, lighter than air aircraft with means of controlling the direction of flight; dirigible. Cf. blimp. [1810 20, for an earlier sense; AIR1 + SHIP] * * * or dirigible Lighter than air aircraft with steering and… … Universalium
airplane — air•plane art at airwaves [[t]ˈɛərˌpleɪn[/t]] n. 1) aer. a heavier than air craft kept aloft by the upward thrust exerted by the passing air on its fixed wings and driven by propellers or jet propulsion 2) aer. any similar heavier than air craft … From formal English to slang
Aviation history — deals with the development of mechanical flight, from the earliest attempts in kite powered and gliding flight, to powered heavier than air flight, and beyond. Humanity s desire to fly possibly first found expression in China, where people flying … Wikipedia
