C-5「銀河」（Galaxy）大型戰略軍用運輸機上的「衝壓空氣渦輪」（Ram Air Turbine，RAT）。RAT 主要用於飛機在發動機停止、輔助動力系統（APU）完全失效時使用的應急渦輪發電機組。因其英文縮寫，它也被稱為「老鼠」。它由飛機飛行時產生的衝壓力驅動，為駕駛艙和飛行控制系統（電傳操縱系統）提供有限的電力。 衝壓空氣渦輪外露的裝置為一個小型的風扇，由飛機飛行時強大的對向氣流帶動其旋轉。早期有些衝壓空氣渦輪設計是將其固定在飛機外部。現代飛機的衝壓空氣渦輪一般安裝在機身或機翼下部，只在緊急狀況下才會伸出，分為自動啟用和飛行員手動啟用兩種。衝壓空氣渦輪的輸出功率由飛機的速度決定，速度越快，輸出功率也就越大。 由於 C-5 運輸機的體積龐大，所以他的老ㄦ.......不是，是「老鼠」也比其他飛機大上一號。 | 世界尖端武器觀測站
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