1.1 本规范涵盖了电力推进装置（EPU）设计的最低要求。 1.2 不排除分布式推进；然而，需要额外的要求来解决分布式推进可能产生的额外问题。其中一些问题可能包括:使用通用电机控制器/逆变器、隔离电气线束、冷却系统、电源等。 1.3 本规范并未解决EPU和内燃机驱动公共推进器的可能混合配置所需的所有要求。 本规范可用于EPU方面，并对推进器和内燃机提出补充要求。 1.4 虽然本规范不包括包括齿轮箱、推进器或任何储能系统的EPU的具体要求，但也不排除此类能力。本规范可用于设计的基本EPU方面，以及制造商编制的任何附加特性的补充要求，并提交给民用适航当局进行验收。 本ASTM规范版本也未解决电机驱动管道风机配置所需的所有要求。预计风机将受到14 CFR 33或CS-E和/或14 CFR 35或CS-P或同等文件的约束，特别是叶片脱落和鸟击。这些操作将作为一个单元（包括电机）在风机上进行，而不是单独在电机或风机上进行。 1.5 关于将本规范作为认证计划的一部分的使用，设计批准申请人应寻求其各自民航局（CAA）机构的个人指导。 有关CAA监管机构接受本规范（全部或部分）作为遵守其通用航空飞机适航法规（以下简称“规则”）的方式的信息，请参阅ASTM委员会F39网页（www.ASTM.org/Committee/F39.htm），其中包括CAA网站链接。 1.6 适用时，本规范可用于带有固定螺距螺旋桨或风扇的EPU。这些配置可以作为包括推进器的EPU进行型式认证。对于这种类型的配置，本规范中可能还没有包括其他要求。 此外 5.25 作为EPU的测试要求。该节认识到，当EPU没有整体推进器时，需要在驱动轴上施加代表性负载进行测试，以确保EPU能够在静态和动态负载下正常工作。 1.7 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.8 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.9 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。

1.1 This specification covers minimum requirements for the design of Electric Propulsion Units (EPU). 1.2 Distributed propulsion is not excluded; however, additional requirements will be needed to address the additional issues that distributed propulsion can create. Some of those issues may include: use of a common motor controller/inverter, segregated electric harnesses, cooling systems, electric power supplies, and others. 1.3 This specification does not address all of the requirements that may be necessary for possible hybrid configurations where an EPU and a combustion engine drive a common thruster. This specification may be used for the EPU aspects with supplemental requirements for the thruster and the combustion engine. 1.4 Although this specification does not include specific requirements for EPUs that include gearboxes, thrusters, or any energy storage systems, it also does not preclude such capabilities. This specification may be used for the base EPU aspects of the design, with supplemental requirements for any additional features prepared by the manufacturer and submitted to the Civil Airworthiness Authority for acceptance. This version of this ASTM specification also does not address all of the requirements necessary for configurations of motor driven ducted-fans. It is anticipated that the fan would be subject to parts of 14 CFR 33 or CS-E and/or 14 CFR 35 or CS-P, or equivalent, in particular blade-off and bird strike. These would be conducted on the fan as a unit (including motor) rather than on motor or fan alone. 1.5 The applicant for a design approval should seek the individual guidance of their respective civil aviation authority (CAA) body concerning the use of this specification as part of a certification plan. For information on which CAA regulatory bodies have accepted this specification (in whole or in part) as a means of compliance to their general aviation aircraft airworthiness regulations (hereinafter referred to as “the Rules”), refer to ASTM Committee F39 webpage (www.ASTM.org/COMITTEE/F39.htm), which includes CAA website links. 1.6 When applicable, this specification may be used for EPUs with a fixed-pitch propeller or fan. These configurations may be type-certificated as an EPU including a thruster. There may be additional requirements not currently included in this specification for this type configuration. In addition, 5.25 is included as a test requirement for the EPU. That section recognizes that when the EPU does not have an integral thruster it will need to be tested with a representative load on the drive shaft to assure EPU ability to operate properly with static and dynamic loads. 1.7 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.9 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.