Road structure – process – or apparatus – Pavement – Including bed
Patent
1997-02-07
1999-03-23
Lisehora, James A.
Road structure, process, or apparatus
Pavement
Including bed
404 71, 404 29, 404 30, 188377, 244110R, E01F 1500
Patent
active
058850252
ABSTRACT:
Vehicle arresting beds, for installation at the ends of aircraft runways, are effective to safely decelerate aircraft entering the bed. The arresting bed is assembled of a large number of blocks of cellular concrete having predetermined compressive gradient strength, so that aircraft landing gear is subjected to drag forces effective to slow a variety of types of aircraft, while providing deceleration within a safe range of values. An arresting bed typically includes an entry region of a depth increasing from 9 to 24 inches formed of blocks having a first compressive gradient strength. A second region, which may be tapered into the first region and increase in depth to 30 inches, is formed of blocks having a greater compressive gradient strength. An aircraft thus experiences increasing drag forces while it travels through the bed, to provide an arresting capability suitable for a variety of aircraft. A protective hardcoat layer of cellular concrete of strength greater than the blocks overlays the blocks to enable service personnel to walk on the bed without damage. Arresting bed systems may be provided in alternative configurations, such as a bed formed of an aggregate including pieces of cellular concrete with or without interspersed pieces of other compressible material and covered by a hardcoat layer.
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Angley Richard D.
Ciesielski Michael S.
Cook Robert F.
Dial Christopher T.
Mahal Peter T.
Datron Inc.
Lisehora James A.
Robinson Kenneth P.
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