An aircraft is a machine that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines. Common examples of aircraft include airplanes, helicopters, airships (including blimps), gliders, and hot air balloons.
A helicopter is a type of rotorcraft in which lift and thrust are supplied by rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward, and laterally. These attributes allow helicopters to be used in congested or isolated areas where fixed-wing aircraft and many forms of VTOL (vertical takeoff and landing) aircraft cannot perform.
Industry is the production of goods or related services within an economy. The major source of revenue of a group or company is the indicator of its relevant industry. When a large group has multiple sources of revenue generation, it is considered to be working in different industries. Manufacturing industry became a key sector of production and labour in European and North American countries during the Industrial Revolution, upsetting previous mercantile and feudal economies. This came through many successive rapid advances in technology, such as the production of steel and coal.
Big industry, freed from the pressure of private property, will undergo such an expansion that what we now see will seem as petty in comparison as manufacture seems when put beside the big industry of our own day. This development of industry will make available to society a sufficient mass of products to satisfy the needs of everyone.
Friedrich Engels, Principles of Communism (1847)
Industry is the vis motrix of husbandry, and therefore an ancient English writer observes, "that a single uncultivated acre is a real physical evil in any state."
Walter Harte Essays on Husbandry (1764), p. 12.
The major vehicle of for the transition to the capitalist mode of production was the textile industry of eighteenth - century England. In cloth production mercantile wealth was visibly transformed into capital, as it acquired the dual function of purchasing machines and raw materials, on the one hand, and buying human energy to power their operation on the other.
Eric Wolf Europe and the People Without History (1982) Chapter 9, Industrial Revolution, p. 267.