airport (redirected from Air strip)

airport or airfield, place for landing and departure of aircraft, usually with facilities for housing and maintaining planes and for receiving and discharging passengers and cargo. There are about 16,000 airports in the United States, ranging from the Hartsfield-Jackson Atlanta International Airport, the world's busiest, which handles 800,000 flights a year, to remote airstrips that may handle only one plane a day. The essential requirements in airport construction are that the field be as level as possible; that the ground be firm and easily drained; that approaches to runways be free of trees, hills, buildings, and other obstructions; and that the site be as free as possible of smoke and weather that produces low-visibility conditions. The Federal Aviation Administration recommends that runways of large airports measure from 2,500 to 12,000 ft (762–3,658 m) in length and 200 to 500 ft (62–150 m) in width; Hartsfield-Jackson airport has four such runways. Narrower paved strips called taxiways that connect the runways to other parts of the airport are entered by aircraft as soon as possible after landing, thus freeing the runways for use by other traffic. A taxiway and a runway are usually connected at each end and at several intermediate points. Besides the hangars (buildings for housing and servicing aircraft), airports are usually provided with office and terminal buildings which house administrative, traffic control, communication, and weather observation personnel. The rapid development of aircraft, especially the jumbo jet, has created problems for all major airports. Greater speed and weight of aircraft have made longer and more durable runways necessary. Greater numbers of passengers have necessitated more efficient methods of moving people and luggage from curb to plane. Despite efforts at curbing jet noise, many communities have rejected plans to build airports within their boundaries; the violent protests over the building of Japan's Narita Airport are the best-known example. Locating airports away from densely populated areas can alleviate noise problems, but this solution makes it difficult for passengers and others to reach the airport.

Bibliography

See R. Allen, Major Airports of the World (1979), R. Horonjeff, Planning and Design of Airports (1983), and A. T. Wells, Airport Planning and Management (1986).

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airport

Site and installations for the takeoff and landing of aircraft. Early airports were open, grass-covered fields, called landing fields, that allowed a pilot to head directly into the wind to aid a plane's lift on takeoff and to decrease its speed on landing. In the 1930s heavier airplanes required paved runway surfaces. Larger planes needed longer runways, which today can reach 15,000 ft (4,500 m) to accommodate the largest jet aircraft. Air traffic is regulated from control towers and regional centres. Passenger and cargo terminals include baggage-movement and passenger-transit operations.

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A family of wireless products from Apple that conform to the 802.11 Wi-Fi standards. In 1999, along with the first iBook laptop, Apple introduced the AirPort 802.11b adapter and base station (access point and router). Four years later, AirPort Extreme increased speed with the 802.11g standard. Base stations include a USB port for attaching a printer, and some units include an analog dial-up modem. See 802.11 and wireless router.

AirPort Express - Media Hub and Bridge
Introduced in 2004, AirPort Express combines an AirPort Extreme base station with a digital media hub. Residing near and connected to a home stereo via analog or digital audio outputs, the AirPort Express "AirTunes" feature allows Apple's iTunes jukebox software to stream music wirelessly from a Mac or Windows PC to a home stereo. AirTunes supports protected AAC titles purchased form Apple's music store.

AirPort Express can serve as a wireless bridge, extending the range of an AirPort network to greater distances throughout the house. See digital media hub and iBook.

An AirPort Base Station

This was the first Airport base station, which provided 802.11b Wi-Fi connectivity. Like most Apple products, it did not resemble any other wireless access point. (Image courtesy of Apple Inc.)