前言 NASA经验表明需要统一宇宙飞行器的设计准则,因此,在下面几个技术领域中提出了准则: 环境结构制导和控制化学推进这些准则的各个部分一旦完成就作为单行专集发表。这套已发表的专集题录可见本文最后一页。(本文路—译者註) 这些专集是什为设计的指南,而不是NASA的局标准文件,除非在正式的设计规范中作了规定。然而,希望这些专集的准则部分,在按照经验进行了修改,表明是符合要求 Foreword NASA experience shows the need to harmonize design guidelines for space vehicles. Therefore, guidelines are proposed in the following technical areas: Environmental Structural Guidance and Control Chemical Propagation Once the various parts of these guidelines have been completed, they are published as solo sections. This set of published album entries can be seen on the last page of this article. These collections are a design guide, not a NASA bureau standard document unless formally laid out in design specifications. However, it is hoped that the guideline sections of these collections, as modified by experience, show that they are satisfactory