DARPA 推出高速 X-76 軍用飛機
DARPA introduces the high-speed X-76 military aircraft
美國國防高等研究計劃署（DARPA）揭露了X-76，這是一架可能重新定義軍用航空的實驗性飛機。
The Defense Advanced Research Projects Agency (DARPA) has unveiled the X-76, an experimental aircraft that could redefine military aviation.
該技術由貝爾德事隆（Bell Textron）為SPRINT計畫所開發，旨在解決一項重大挑戰：將固定翼噴射機的高速性能與直升機的垂直起降（VTOL）靈活性相結合。
Developed by Bell Textron for the SPRINT program, this technology aims to solve a major challenge: combining the high speed of fixed-wing jets with the vertical takeoff and landing (VTOL) agility of helicopters.
與仰賴長跑道的傳統飛機不同，X-76設計用於在簡陋且未經準備的場地起降。
Unlike traditional aircraft that rely on long runways, the X-76 is designed to operate from austere, unprepared locations.
其秘密在於獨特的「停止-摺疊（ㄊㄧㄠˊ）」（stop-fold）傾轉旋翼系統。
Its secret lies in a unique 'stop-fold' tiltrotor system.
一旦進入飛行狀態，這些旋翼就會停止並摺疊起來，大幅減少空氣阻力，使其能以超過400節的噴射機速度巡航。
Once airborne, these rotors stop and fold away, significantly reducing drag to allow for jet-like cruising speeds exceeding 400 knots.
雖然X-76並非用於量產，但它作為一個至關重要的概念驗證，展現了未來軍事機隊如何實現更高的戰術靈活性。
While not intended for mass production, the X-76 serves as a vital proof-of-concept, showcasing how future military fleets might achieve greater tactical flexibility.
