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The Altair was a solid-fuel rocket with a fiberglass casing, initially developed for use as the third stage of Vanguard rockets. It was manufactured by Allegany Ballistics Laboratory (ABL) as the X-248. It was also sometimes called the Burner 1. ==Uses== The X-248 was one of two third-stage designs used during Project Vanguard. Early launches used a stage developed by the Grand Central Rocket Company, but later launches used the X-248 which enabled the Vanguard to launch more massive payloads. The X-248 was used as the second stage of some early Thor flights. These vehicles were designated "Thor-Burner". Altairs were used as the third stage of early Delta rockets. The fourth stage of the Scout rocket also used the "Altair" stage. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Altair (rocket stage)」の詳細全文を読む スポンサード リンク
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