The US government wants to change the rules for fast planes. Now, planes can fly very fast over the ocean, but not over land.

美國政府想要修改超高速飛機的規定。目前飛機在海洋上空可以飛行得很快，但不能在陸地上空這樣做。

In 1973, the government stopped fast planes over land. These planes make a loud noise called a sonic boom. This noise is bad for people on the ground.

1973年，政府禁止了超高速飛機在陸地上空飛行。這些飛機會產生一種稱為「音爆」的巨大噪音。這種噪音對地面上的人來說非常糟糕。

Now, the government wants new rules. They want to limit the noise instead of stopping the planes. The FAA will finish these new rules by 2027.

現在，政府想要制定新規定。他們希望限制噪音，而不是直接禁止飛機飛行。美國聯邦航空管理局（FAA）將在2027年前完成這些新規定。

NASA has a new plane called the X-59. This plane is very fast but it is quiet. It makes a small sound, not a big boom. Other companies are also making fast planes.

美國國家航空暨太空總署（NASA）有一款名為 X-59 的新飛機。這架飛機速度很快但很安靜。它只會產生微小的聲音，而不是巨大的爆裂聲。其他公司也在製造超高速飛機。

These planes will save a lot of time. A flight from New York to Los Angeles will take only three hours. A flight to London will take four hours.

這些飛機將節省大量時間。從紐約飛往洛杉磯僅需三小時。飛往倫敦則需要四小時。

The US will change the rules by 2027. Fast planes can fly over land if they are quiet.

美國將在2027年前修改規定。只要夠安靜，超高速飛機就可以在陸地上空飛行。

The United States government is updating its aviation rules to allow supersonic flights over land. This change is possible because of new technology that can reduce the noise created by these aircraft.

美國政府正在更新航空規則，以允許在陸地上空進行超音速飛行。這項改變得益於能減少此類飛機所產生噪音的新技術。

Since 1973, civilian supersonic flights over land have been banned to prevent the disturbance caused by sonic booms. Because of this rule, planes like the Concorde could only fly at supersonic speeds over the ocean. The Concorde began service in 1976 but was retired in 2003 due to high costs and a serious accident in 2000.

自 1973 年起，為了防止音爆造成的干擾，民用超音速飛機被禁止在陸地上空飛行。由於這項規定，像協和客機這樣的飛機只能在海洋上空以超音速飛行。協和客機於 1976 年開始服務，但由於成本高昂以及 2000 年發生的一起嚴重事故，於 2003 年退役。

Now, the government is moving toward a system based on noise limits rather than a total ban. In June 2025, an executive order stated that the old rules were stopping American companies from being competitive. Consequently, the Federal Aviation Administration (FAA) proposed new noise limits in June 2026. Further rules regarding takeoff and landing noise are expected soon, and the entire framework should be finished by mid-2027.

現在，政府正將制度從全面禁止轉向基於噪音限制的體系。2025 年 6 月的一項行政命令指出，舊有規則阻礙了美國公司的競爭力。因此，美國聯邦航空管理局 (FAA) 在 2026 年 6 月提出了新的噪音限制。預計很快將出台有關起飛和降落噪音的進一步規定，整個框架應於 2027 年中完成。

To test this, NASA and Lockheed Martin developed the X-59 experimental aircraft. On June 5, the X-59 reached its target speed and altitude, producing a 'quiet thump' instead of a loud boom. Although the X-59 is not for passengers, its data will help the FAA set the new standards. If these rules are approved, flights from New York to Los Angeles could take only three hours, while New York to London could take four hours. Other companies, such as Boom Supersonic and Spike Aerospace, are also working on similar projects.

為了測試這一點，NASA 與 Lockheed Martin 開發了 X-59 實驗機。在 6 月 5 日，X-59 達到了目標速度與高度，產生的是「輕微的砰聲」而非巨大的音爆。雖然 X-59 並非用於載客，但其數據將幫助 FAA 設定新標準。如果這些規則獲得批准，從紐約飛往洛杉磯可能僅需三小時，而紐約飛往倫敦可能僅需四小時。其他公司，如 Boom Supersonic 和 Spike Aerospace，也在開發類似的項目。

The US is moving from a complete ban on overland supersonic flight to a system based on noise standards, which the FAA expects to finalize by 2027.

美國正從全面禁止陸上超音速飛行，轉向基於噪音標準的體系，FAA 預計將於 2027 年定案。

The United States government is currently revising federal aviation regulations to allow supersonic flight over land, supported by recent technological demonstrations of noise-reduction capabilities.

美國政府目前正在修訂聯邦航空法規，以允許在陸地上進行超音速飛行，此舉得到了近期噪音降低能力技術演示的支持。

The current regulatory framework, established in 1973, prohibited civilian supersonic flight over land to mitigate the impact of sonic booms. This restriction historically confined supersonic operations, such as those of the Concorde, primarily to oceanic routes. The Concorde, which entered service in 1976, was eventually retired in 2003 following a combination of high operational costs and a fatal incident in 2000.

目前的監管框架建立於1973年，禁止民用超音速飛行在陸地上運行，以減輕音爆（sonic booms）的影響。這項限制在歷史上將超音速運行（例如協和客機）主要限制在海洋航線。協和客機於1976年投入服務，但由於營運成本高昂以及2000年發生的致命事故，最終於2003年退役。

Under the direction of the Trump administration, a shift toward a noise-based regulatory standard has commenced. An executive order issued in June 2025 characterized previous regulations as impediments to American industrial competitiveness. Consequently, the Federal Aviation Administration (FAA) proposed a rule in June 2026 to replace the blanket ban with specific noise limits. A secondary set of standards regarding takeoff and landing noise is expected later this year, with finalization of both frameworks anticipated by mid-2027.

在川普政府的指導下，監管標準已開始轉向以噪音為基準。2025年6月發布的一項行政命令將之前的法規定義為美國工業競爭力的障礙。因此，聯邦航空管理局（FAA）於2026年6月提出了一項規則，擬將全面禁令替換為具體的噪音限制。關於起飛和降落噪音的第二套標準預計將於今年晚些時候出台，兩個框架預計將在2027年年中最終確定。

Technological viability is being assessed via NASA's X-59 experimental aircraft, developed in collaboration with Lockheed Martin. On June 5, the X-59 achieved its target speed and altitude, demonstrating a 'quiet thump' rather than a traditional sonic boom. While the X-59 is not a commercial passenger vehicle, its data will inform the FAA's noise-based standards. Should these regulations be implemented, projected cruise speeds of Mach 1.4 could reduce a New York to Los Angeles flight to approximately three hours and a New York to London flight to four hours. Other private entities, including Boom Supersonic and Spike Aerospace, are also developing transatlantic supersonic capabilities.

技術可行性正透過NASA與洛克希德馬丁（Lockheed Martin）合作開發的X-59實驗機進行評估。6月5日，X-59達到了目標速度和高度，證明其產生的是「低沉的 thumping 聲」而非傳統的音爆。雖然X-59並非商業客機，但其數據將為FAA的噪音標準提供參考。若這些法規得以實施，預計1.4馬赫的巡航速度可將紐約至洛杉磯的航程縮短至約三小時，紐約至倫敦則縮短至四小時。其他私人實體，包括Boom Supersonic和Spike Aerospace，也正在開發跨大西洋的超音速飛行能力。

The US is transitioning from a total ban on overland supersonic flight to a noise-standardized system, pending the finalization of FAA rules in 2027.

美國正從全面禁止陸地超音速飛行轉向以噪音標準化為主的系統，目前正等待FAA於2027年完成法規定案。