第二架 B-21 戰機首飛，空軍擴展測試計畫進入新階段

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Air Force

美國空軍於 2025 年 9 月 11 日宣布，第二架 B-21「突襲者」(Raider) 隱形轟炸機成功完成首飛，並抵達加州愛德華茲空軍基地，正式投入飛行測試。這一進展使空軍能將測試從單純的飛行性能驗證，擴展至武器整合、任務系統檢測以及後勤維護演練等更深入的領域。

空軍高層表示，隨著第二架戰機加入，測試效率將大幅提升，不僅能同時驗證武器掛載與生存能力，也能讓維修人員及早熟悉日常維護操作，為未來部屬奠定基礎。空軍參謀長戴維·奧爾文強調，這對建立後勤體系與維修流程至關重要。

製造商諾斯洛普·格魯曼指出，B-21 是全球首款第六代戰機，擁有先進隱形與滲透打擊能力，可搭載核子與常規武器。美國空軍計畫未來部署至少 100 架 B-21，以逐步取代 B-1B 與 B-2A，同時搭配 76 架升級後的 B-52J。

此外，空軍還計畫於 2026 財年在南達科他州埃爾斯沃斯、密蘇里州懷特曼，以及德州戴耶斯三大基地展開基礎設施建設，以支援 B-21 部屬與維修需求。

🔑 三大觀察重點

1. 美國核打擊力升級：B-21 具備隱形與遠程滲透能力，將成為美國戰略威懾的核心。
2. 測試規模擴大：第二架 B-21 加入測試，意味武器掛載、任務系統及維修演練全面展開。
3. 對亞太安全影響：B-21 未來可望常態化部署至太平洋，對台灣周邊安全形勢產生戰略震撼。

Second B-21 Raider Completes First Flight as U.S. Air Force Expands Testing

📄 Full Article 

On September 11, 2025, the U.S. Air Force announced that its second B-21 Raider stealth bomber successfully completed its first flight and arrived at Edwards Air Force Base in California for formal flight testing. The addition of this aircraft allows testing to expand beyond basic flight evaluations to include weapons integration, mission system verification, and logistics readiness.

Senior Air Force leaders highlighted that having two aircraft accelerates the evaluation process, enabling simultaneous testing of weapon carriage, survivability, and maintenance procedures. Gen. David Allvin, the Air Force Chief of Staff, emphasized that this milestone is crucial for building sustainment capabilities and routine operational readiness.

Manufacturer Northrop Grumman described the B-21 as the world’s first sixth-generation bomber, designed with advanced stealth and long-range penetration capabilities to deliver both nuclear and conventional weapons. The Air Force plans to acquire at least 100 B-21s to gradually replace the B-1B and B-2A fleets, complemented by 76 upgraded B-52Js.

Additionally, the Air Force is preparing major construction projects at Ellsworth (South Dakota), Whiteman (Missouri), and Dyess (Texas) Air Force Bases in FY2026 to support B-21 basing and sustainment infrastructure.

🔑 Three Key Points 

1. Nuclear deterrence upgrade: The B-21 strengthens America’s stealth nuclear strike capabilities.
2. Expanded testing scope: With a second bomber, weapon integration, mission systems, and logistics can now be tested in parallel.
3. Impact on Asia-Pacific: The B-21’s deployment potential in the Pacific poses strategic implications for Taiwan’s security.