本文件描述了为大型商用飞机设计燃油系统时的主要设计驱动因素和考虑因素。它讨论了系统/飞机级别的设计，并不打算作为单个系统组件的设计手册，尽管它参考了其他SAE规范，其中给出了关于特定组件和子系统的更多细节。它确实包括基于NAV-AIR-06-5-504中给出的与燃油系统尺寸相关的许多计算示例，以及总结燃油系统设计关键的基本流体力学方程的附录。众所周知，今天这些计算中的大多数将通过建模工具而不是手工来执行，但对于设计者来说理解原理被认为是重要的。 本文件的后续问题将包括附录，给出军用飞机、小型商用飞机和旋翼机的具体考虑。

This document describes the major design drivers and considerations when designing a fuel system for a large commercial aircraft. It discusses the design at a system/aircraft level, and is not intended as a design manual for individual system components, though it does refer out to other SAE specifications where more detail on specific components and sub-systems is given. It does include examples of a number of calculations associated with sizing of fuel systems, based on those given in NAV-AIR-06-5-504, as well as an appendix summarizing basic fluid mechanical equations which are key for fuel system design. It is acknowledged that most of these calculations would today be performed by modelling tools, rather than by hand, but it is considered important for the designer to understand the principles. It is intended that later issues of this document will include appendices which give specific considerations for military aircraft, smaller commercial aircraft, and rotorcraft.