■林國賓
原文：
The F-47 is expected to make its first flight in 2028, the Air Force’s top officer said Monday—advancing the timeline by a year. Officials had previously said the sixth-gen combat aircraft would fly by January 2029.
"We got to go fast," Air Force Chief of Staff Gen. David Allvin said during his keynote address at the Air, Space and Cyber Conference here. "It’s almost 2026. The team is committed to getting the first one flying in 2028." Manufacturing has begun on the first F-47, Allvin added.
Public details about the F-47 have been few. In May, Allvin posted a chart that said the F-47 will be operational in "2025 to 2029," have a combat radius of more than 1,000 nautical miles, and fly faster than Mach 2. For comparison, the F-22 Raptor has a combat radius of 590 nautical miles and a top speed over Mach 2, while the F-35 has a combat radius of 670 nautical miles and a top speed of Mach 1.6.
The graphic also offered a vague assessment of each jet's stealth capabilities: the F-47 will have "stealth++" capabilities, while the F-22 has "stealth+" and the F-35 is merely listed as "stealth."
中譯：
美國空軍最高將領週一表示，F-47將於2028年進行首次試飛，比原定時程提前1年；官方原規劃第6代戰機於2029年1月前首飛。
空軍參謀長阿爾文上將在「航太網路會議」發表專題演講時表示：「我們必須加快腳步。眼看2026年即將到來，研發團隊承諾要讓首架原型機於2028年升空。」他並透露，首架F-47已開始製造。
外界對F-47細節所知甚少。今年5月，阿爾文曾公布一份簡報圖表，指出F-47將於2025至2029年間具備作戰能力；其作戰半徑超過1000浬，極速超過2馬赫。相較之下，F-22「猛禽」戰機作戰半徑590浬，最高速度逾2馬赫；F-35戰機作戰半徑670浬，最高速度1.6馬赫。
簡報中亦對匿蹤性能進行概略分級：F-47具備「匿蹤＋＋」能力，F-22為「匿蹤＋」，F-35則僅列為「匿蹤」。
-關鍵軍語-
※combat radius：作戰半徑
※stealth：匿蹤