同じ分類のタグ 軍事 › United States
Danbooru の英語定義
The [B]North American X-15[/B] was a hypersonic rocket-powered aircraft operated by the United States Air Force and the National Aeronautics and Space Administration (N.A.S.A.) as part of the X-plane series of experimental aircraft. The X-15 set speed and altitude records in the 1960s, reaching the edge of outer space and returning with valuable data used later in aircraft and spacecraft design. The X-15's official world record for the highest speed ever recorded by a manned, powered aircraft, set in October 1967 when William J.