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A jet blast deflector (JBD) or blast fence is a safety device that redirects the high energy exhaust from a jet engine to prevent damage and injury. The structure must be strong enough to withstand heat and high speed air streams as well as dust and debris carried by the turbulent air. Without a deflector, jet blast can be dangerous to people, equipment and other aircraft.Morrison, Rowena. ''ASRS Directline'', Issue Number 6, August 1993. ("Ground Jet Blast Hazard." ) Retrieved on November 13, 2009.Jet blast deflectors range in complexity from stationary concrete, metal or fiberglass fences to heavy panels that are raised and lowered by hydraulic arms and actively cooled. Blast deflectors can be used as protection from helicopter and fixed-wing aircraft propwash. At airports and jet engine service centers, jet blast deflectors can be combined with sound-deadening walls to form a ground run-up enclosure within which a jet aircraft engine can safely and more quietly be tested at full thrust.A jet blast deflector is often called simply a "blast deflector", however, this term has other uses. In gunnery, the term "blast deflector" refers to a device which protects the gun crew from the muzzle blast of a gun. In small arms, a "blast deflector" is another name for a muzzle brake which directs muzzle blast to the sides and upward to prevent the muzzle from climbing during automatic fire.Carlucci, Donald E. and Sidney S. Jacobson. ''Ballistics: Theory and Design of Guns and Ammunition'', pp. 158–159. CRC Press, 2007. ISBN 1-4200-6618-8==Purpose==High energy jet engine exhaust can cause injury and damage. Jet blast has been known to uproot trees, shatter windows, overturn automobiles and trucks, flatten poorly made structures and injure people. Other aircraft in the jet blast, especially lightweight ones, have been blown around and damaged by jet exhaust. Hurricane-force air streams moving at speeds up to have been measured behind the largest jet-powered aircraft at distances of over . A Boeing 777's two General Electric GE90 engines combine to create a thrust of approximately Stanley, Lynn B. ''Split exhaust jet blast deflector fence''. , issued July 4, 1995.—this level of force is high enough to kill people. To prevent these problems, jet blast deflectors redirect the air stream in a non-dangerous direction, frequently upward.
A jet blast deflector (JBD) or blast fence is a safety device that redirects the high energy exhaust from a jet engine to prevent damage and injury. The structure must be strong enough to withstand heat and high speed air streams as well as dust and debris carried by the turbulent air.〔 Without a deflector, jet blast can be dangerous to people, equipment and other aircraft.〔Morrison, Rowena. ''ASRS Directline'', Issue Number 6, August 1993. ("Ground Jet Blast Hazard." ) Retrieved on November 13, 2009.〕
Jet blast deflectors range in complexity from stationary concrete, metal or fiberglass fences to heavy panels that are raised and lowered by hydraulic arms and actively cooled. Blast deflectors can be used as protection from helicopter and fixed-wing aircraft propwash. At airports and jet engine service centers, jet blast deflectors can be combined with sound-deadening walls to form a ground run-up enclosure within which a jet aircraft engine can safely and more quietly be tested at full thrust.
A jet blast deflector is often called simply a "blast deflector", however, this term has other uses. In gunnery, the term "blast deflector" refers to a device which protects the gun crew from the muzzle blast of a gun. In small arms, a "blast deflector" is another name for a muzzle brake which directs muzzle blast to the sides and upward to prevent the muzzle from climbing during automatic fire.〔Carlucci, Donald E. and Sidney S. Jacobson. ''Ballistics: Theory and Design of Guns and Ammunition'', pp. 158–159. CRC Press, 2007. ISBN 1-4200-6618-8〕
==Purpose==
High energy jet engine exhaust can cause injury and damage. Jet blast has been known to uproot trees, shatter windows, overturn automobiles and trucks, flatten poorly made structures and injure people.〔 Other aircraft in the jet blast, especially lightweight ones, have been blown around and damaged by jet exhaust.〔 Hurricane-force air streams moving at speeds up to have been measured behind the largest jet-powered aircraft at distances of over .〔 A Boeing 777's two General Electric GE90 engines combine to create a thrust of approximately 〔Stanley, Lynn B. ''Split exhaust jet blast deflector fence''. , issued July 4, 1995.〕—this level of force is high enough to kill people.〔 To prevent these problems, jet blast deflectors redirect the air stream in a non-dangerous direction, frequently upward.
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「A jet blast deflector (JBD) or blast fence is a safety device that redirects the high energy exhaust from a jet engine to prevent damage and injury. The structure must be strong enough to withstand heat and high speed air streams as well as dust and debris carried by the turbulent air. Without a deflector, jet blast can be dangerous to people, equipment and other aircraft.Morrison, Rowena. ''ASRS Directline'', Issue Number 6, August 1993. ("Ground Jet Blast Hazard." ) Retrieved on November 13, 2009.Jet blast deflectors range in complexity from stationary concrete, metal or fiberglass fences to heavy panels that are raised and lowered by hydraulic arms and actively cooled. Blast deflectors can be used as protection from helicopter and fixed-wing aircraft propwash. At airports and jet engine service centers, jet blast deflectors can be combined with sound-deadening walls to form a ground run-up enclosure within which a jet aircraft engine can safely and more quietly be tested at full thrust.A jet blast deflector is often called simply a "blast deflector", however, this term has other uses. In gunnery, the term "blast deflector" refers to a device which protects the gun crew from the muzzle blast of a gun. In small arms, a "blast deflector" is another name for a muzzle brake which directs muzzle blast to the sides and upward to prevent the muzzle from climbing during automatic fire.Carlucci, Donald E. and Sidney S. Jacobson. ''Ballistics: Theory and Design of Guns and Ammunition'', pp. 158–159. CRC Press, 2007. ISBN 1-4200-6618-8==Purpose==High energy jet engine exhaust can cause injury and damage. Jet blast has been known to uproot trees, shatter windows, overturn automobiles and trucks, flatten poorly made structures and injure people. Other aircraft in the jet blast, especially lightweight ones, have been blown around and damaged by jet exhaust. Hurricane-force air streams moving at speeds up to have been measured behind the largest jet-powered aircraft at distances of over . A Boeing 777's two General Electric GE90 engines combine to create a thrust of approximately Stanley, Lynn B. ''Split exhaust jet blast deflector fence''. , issued July 4, 1995.—this level of force is high enough to kill people. To prevent these problems, jet blast deflectors redirect the air stream in a non-dangerous direction, frequently upward.」の詳細全文を読む
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