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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Engineered materials arrestor system ： ウィキペディア英語版 Engineered materials arrestor system An engineered materials arrestor system, engineered materials arresting system (EMAS), or arrester bed is a bed of engineered materials built at the end of a runway. Engineered materials are defined in FAA Advisory Circular No 150/5220-22A as "high energy absorbing materials of selected strength, which will reliably and predictably crush under the weight of an aircraft". While the current technology involves lightweight, crushable concrete blocks, there is no regulatory requirement that this material be used for EMAS. The purpose of an EMAS is to stop an aircraft overrun with no human injury and minimal aircraft damage. The aircraft is slowed by the loss of energy required to crush the EMAS material. An EMAS is similar in concept to the runaway truck ramp made of gravel or sand. It is intended to stop an aircraft that has overshot a runway when there is an insufficient free space for a standard runway safety area (RSA). Multiple patents have been issued on the construction and design on the materials and process. FAA Advisory Circular 150/5220 explains that an EMAS may not be effective for incidents involving aircraft of less than 25,000 pounds weight.〔() FAA Advisory Circular 150/5220-22B (PDF)〕 It also clarifies that an EMAS is not the same as a stopway, which is defined in FAA Advisory Circular 150/5300-13A, Section 312.〔() FAA Advisory Circular 150/5300-13A (PDF)〕 ==US installations== The FAA's design criteria for new airports designate Runway Safety Areas (RSA), to increase the margin of safety if an overrun occurs, and to provide additional access room for response vehicles. A US federal law requires that the length of RSA in airports is to be by the end of 2015 in a response to a runway overrun into a highway at Teterboro Airport in New Jersey.〔 At airports built before these standards were put into effect, the FAA has begun funding the installation of EMAS at the ends of the main runways. As of July 2014, 47 US airports had been so equipped; the plan is to have 62 airports so equipped by the end of 2015.〔''Runway Risk'', Flying, September 2014 issue, p. 57〕 The minimum recommended overall length of an EMAS installation is , of which at least is to consist of the frangible material.〔FAA AC 150-5220〕 As of August 2015, over 100 EMAS have been installed, in large majority by Zodiac (other manufacturers have installed one each). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Engineered materials arrestor system」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.