美空軍追加45億美元　B-21「突襲者」2027年首架交付成定局

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美國空軍宣布，透過2025年和解方案所提供的45億美元額外資金，將加速B-21「突襲者」（Raider）匿蹤戰略轟炸機的量產進程，並明確指出首架作戰單位用機將於2027年交付南達科他州的Ellsworth Air Force Base。此舉也首度為B-21服役時程訂下具體年份。
The U.S. Air Force has announced that an additional $4.5 billion provided under the 2025 reconciliation package will accelerate production of the B-21 Raider stealth strategic bomber, with the first operational aircraft scheduled for delivery to Ellsworth Air Force Base in South Dakota in 2027. This marks the first time a specific delivery year has been publicly confirmed.

過去美方僅以「2020年代中期」概括B-21成軍時間，如今明確鎖定2027年，不僅代表計畫進度趨於穩定，也顯示戰略轟炸機現代化時程正逐步落實。
Previously, the Air Force had only indicated that the B-21 would become operational in the “mid-2020s.” The firm 2027 target suggests program stability and signals tangible progress in modernizing America’s strategic bomber fleet.

已進入低率初始生產　3月可望簽署擴產合約

Aircraft in Low-Rate Initial Production, Expansion Contract Expected in March

B-21「突襲者」由Northrop Grumman研發與生產，並於2023年11月完成首飛測試。目前該機型已進入低率初始生產（LRIP）階段，象徵技術風險已大幅降低，製造流程逐步成熟。
The B-21 Raider is developed and manufactured by Northrop Grumman and conducted its first flight in November 2023. The aircraft has since entered low-rate initial production (LRIP), indicating reduced technical risk and increasing maturity in the manufacturing process.

諾格方面表示，將B-21交付空軍操作與維保人員，是數千名團隊成員共同努力的目標；外界預期，美軍擴大生產規模的相關合約將於3月完成簽署。
Northrop Grumman has stated that delivering the B-21 to Air Force operators and maintainers represents the mission of thousands of team members, with expanded production contracts expected to be finalized in March.

取代B-1與B-2　強化核常兼備嚇阻戰力

Replacing B-1 and B-2 to Strengthen Dual-Capable Strategic Deterrence

B-21「突襲者」屬第六代匿蹤轟炸機，具備搭載常規與核武器能力，未來將逐步取代B-1「槍騎兵」與B-2「幽靈」兩型戰略轟炸機，重建美國空軍長程打擊主力。
As a sixth-generation stealth bomber, the B-21 is designed to carry both conventional and nuclear payloads and will gradually replace the B-1 Lancer and B-2 Spirit strategic bombers, forming the backbone of future U.S. long-range strike capabilities.

新機型除提升低可偵測性技術外，亦強調高度系統整合與數位架構設計，以適應未來高度對抗環境下的遠程精準打擊任務。
Beyond enhanced low observability, the aircraft emphasizes advanced system integration and digital architecture to operate effectively in highly contested environments requiring long-range precision strike capabilities.

單價約7億美元　採購規模尚未調整

Unit Cost Estimated at $700 Million, Procurement Quantity Unchanged for Now

依最新成本評估，B-21單機價格約7億美元，較2010年估算的5.5億美元略為增加；不過，美國空軍尚未宣布是否調整原訂採購100架的規劃。
According to updated cost estimates, each B-21 is priced at approximately $700 million, higher than the $550 million projection in 2010. The Air Force has not indicated any change to the original plan to procure 100 aircraft.

B-21具備多項關鍵特性，包括高度低可偵測設計、可選擇載人或無人駕駛模式、次音速最大速度、遠程滲透打擊能力，以及與大多數現役美軍武器系統的相容性。這些能力將使其成為美國未來數十年戰略嚇阻體系的核心節點。
Key features of the B-21 include advanced low-observability design, optional manned or unmanned operation, subsonic maximum speed, long-range penetration capability, and compatibility with most current U.S. munitions. Together, these attributes position it as a central pillar of America’s strategic deterrence architecture for decades to come.