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Aircraft

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Aircraft: a machine capable of atmospheric flight (see air transport). Aircraft can be sub-divided into two broad categories: heavier than air (airplanes, autogyros, helicopters, and variants), and lighter than air (balloons, blimps, and dirigibles).

A fixed-wing aircraft is also known as an airplane (British spelling: aeroplane).

Conventional or fixed-wing, aircraft generally use a propeller or jet engine to provide thrust, which moves the craft forward through the air. The movement of air over the wings produces lift, which allows the aircraft to fly. An exception is gliders which have no engines and gain their thrust from gravity. That is, they must descend in relation to the air in order to maintain their forward speed. Helicopters use a spinning rotor (a rotary wing) to provide both lift and thrust.

Lighter-than-air craft float in air in the same way that a ship floats in water, by displacing the air around the craft with a lighter gas such as helium, hydrogen, or hot air. They may have propellers to provide forward thrust or they may simply drift with the wind.

Types of Aircraft

Lighter than air

Heavier than air

Propulsion Types

Aircraft manufacturers (in alphabetic order)

(it might be useful to distinguish between current and historic list, at some point.)

Talk

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