【由2001年CH-47事故 淺論直昇機意外事件發生之前幾大因素】 今日國軍UH-60M直昇機空難，8位軍人罹難，粉專全體小編深感哀悼。事故發生的原因，由於有生還者，機體殘骸也已尋獲，應不難查出。 根據EHEST（歐洲直昇機安全分析團隊）收搜集2000-2005 年歐洲直昇機意外，分析失事的多數因素，為「環境」、「機械」與「人為」三大類，排名前四的實際原因又可分為： 1、飛行員在目視環境變差情形下失去方向感（pilot disorientation in the Degraded Visual Environment ），可能是目視不良，或根本沒看見障礙物，導致失控、撞擊，或是儀器飛行時失誤。 2、渦流環狀態（Vortex Ring State）：在有動力的狀態，直昇機下沉到自己的下洗流中，造成極大速度的下降，通常超過原下降速率的3 倍以上。 3、尾旋翼失效（Loss of Tail Rotor Effectiveness）：一般設計主旋翼順時針旋轉者，右舵為抵抗扭力，失效會造成整機打轉失控。 4、靜態及動態翻覆（Static & Dynamic Rollover）：直昇機的重心超過轉
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