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Old 6th Jul 2010, 03:32
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The Black Dragon
 
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HK Oriental Daily Newspaper today ( No Edit )

Google Chinese to English Translation:
疑渦輪葉片脫離肇事 民航處前處長樂鞏南認為,若然直升機尾螺旋槳打着麻鷹而導致意外,民航處便不至於暫停整隊同型號的直升機飛行,他不相信意外是尾 螺旋槳破損所致,因為若然尾螺旋槳失效,該直升機根本無法平穩地降落海面。 他懷疑是涉事直升機其中一台渦輪發動機的壓縮器或其渦輪葉片脫離,打穿發動機外罩或機身,故駕駛員說他聽到其後面發出巨響,而非 說機尾,而由於渦輪發動機的轉速達每分鐘幾萬轉,所以葉片飛出的速度有如子彈。 樂鞏南並指出,現時渦輪的設計,渦輪碟與渦輪葉片,多是一個整體鑄造,而非往日的一片一片的安裝到渦輪碟上,故安全性應提升了數 十倍,但不等於沒有風險,若鑄造過程有瑕疵,該整塊渦輪碟應會提早碎裂,一塊一塊連葉片會以子彈速度飛出。

Turbine blades from the incident the suspect

Former Director of Civil Aviation Lok that if a helicopter tail propeller accidents caused eagle banner of the Civil Aviation Department suspended the entire team they might not need the same type of helicopter flight, he did not believe the end of the propeller is damaged due to accident, because if the end propeller failure, the helicopter could not land a smooth sea.

He suspected that someone's helicopter one of the turbine engine compressor or turbine blades out, penetrated the engine housings, or body, so the driver said he heard the tremendous noise behind it, not that the tail, and as turbine engines speed up transfer of tens of thousands per minute, so the speed is like leaves flying out of bullets.

Lok and pointed out that the turbine design, turbine discs and blade, multi-casting a whole, rather than the past of a piece of plate on the installation of the turbine, so security should be raised a few times, but it does not mean there is no risk, if there are flaws in the casting process, the block should be advanced turbine disk fragments, a piece with blade speed will fly out of bullets.




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