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lift that causes the aircraft to fly. Exceptions are gliders which have no engines and gain
their thrus t, initially, from winches or tugs and then from gravity and thermal currents . That
is , in order to maintain their forward s peed they mus t des cend in relation to the air (but not
necessarily in relation to the ground). Helicopters and autogyros use a spinning rotor (a
rotary wing) to provide both lift and thrust. The abbreviation VTOL is applied to aircraft
other than helicopters that can take off or land vertically. Similarly, STOL stands for Short
Take Off and Landing.
2) Lighter than air
Lighter than air aerostats: balloons and airships. Aerostats float in air in the same way
that a ship floats in water, by displacing the air around the craft with a lighter gas (helium or
hydrogen), or hot air. The distinction between a balloon and an airship is that an airship has
some means of controlling forward motion and steering, while balloons simply drift with the
wind.
There are several ways to classify aircraft, e.g. by design, propulsion and usage. Three
major uses for aircraft may be seen: recreational, military, and commercial.
Text 5. Motel
The word motel originates from the Motel Inn of San Luis Obis po, firs t built in 1925
by Arthur Heinman. Entering dictionaries after World War II, the motel (aka the motor
hotel) referred initially to a single building of connected rooms whose doors face a parking
lot and/or common area, and their creation was the outcome of the creation of the United
States highway system which predated the Interstate highway system and allowed easy
cross-country travel.
Un like their predecess ors , auto camps and touris t courts , motels quickly adopted a
homogenized appearance. Typically one would find an 'I' or 'L' or 'U' shaped structure that
included rooms, an attached manager's office, and perhaps a small diner. Even so, postwar
motels often featured eye-catching neon signs which employed pop culture themes that
ranged from Western imagery of cowboys and indians to contemporary images of
spaceships and atomic symbols.
The modern motel began in the 1920s as mo m-and-pop motor courts on the outskirts
of a town. They attracted the first road warriors as they crossed the U. S. in their new
automobiles. They usually had a grouping of small cabins and their anonymity made them
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