11月15日的《中國時報》有一則對軍事迷來說應該是蠻有趣的報導,題為『抗中殺手衛星 美研發太空「鷹隼」』(白德華/外電報導),敘述美國研發新型武器的計畫。 不過有一段話我實在看不懂:
在剛通過的四千五百九十億美元國防預算中,名為「鷹隼」的這項雄心勃勃的計畫,主要是發展一種可達音速六倍的快速運載系統,它飛行速度達音速廿五倍,受重力加速度影響,其毀滅力更驚人。
一下子可達音速六倍,一下子又可達廿五倍,到底是什麼神奇的武器?因為這篇報導引述英國《每日電訊報》(Daily Telegraph),所以我上了他們的網站找到了原始的報導,發現上面那段話的原文其實是:
The most ambitious project in a new $459 billion (£221.5 billion) defence spending Bill is the Falcon, a reusable “hypersonic vehicle” that could fly at six times the speed of sound and deliver 12,000lb of bombs anywhere in the world within minutes.
The bombs’ destructive power would be multiplied by the Earth’s gravitational pull as they travelled at up to 25 times the speed of sound towards their target.
原來六倍音速的是載具,廿五倍音速是載具發射的飛彈(或炸彈),這位記者也真會濃縮!中時這篇報導裡有問題的文字還不止這些,例如(粗體是我為了便於閱讀而加上的):
華府武器專家湯普森說,這項計畫焦點放在「具有時間敏感度的目標國家」如北韓、伊朗,這些國家都被懷疑在未獲國際准許下發展核子武器。
原文是:
Loren Thompson, a leading defence analyst in Washington, said the focus of the project was attacking “time sensitive targets” in states such as North Korea and Iran, which have either developed nuclear weapons without international approval or are suspected of doing so.
還有:
「比如我們接到情報,南韓或以色列將受到攻擊,我們應在數分鐘內、而不是數小時進行反制,但以目前美國部署全球的基地而言,根本做不到」。湯普森說,「如果部署超速度運載系統,不管經過中東或亞洲敵對區領空,都只是數分鐘的事。」
而原文是:
“If we received intelligence that a strike was about to happen on South Korea, or on Israel, we would want to destroy that within minutes and not hours. But from most current US bases that is not feasible.
“With a hyper-sonic vehicle launching from the Middle East or Asia you could be over hostile territory within minutes,” he said.
所以看翻譯的報導(或書籍)時,真要「大膽假設,小心求證」。
Isn’t Mach 25 is the min. orbital speed needed for low Earth orbit satellite?