本文件旨在提供有关设计因素的最新信息，这些设计因素必须在设计新的或经过重大修改的发动机测试单元时予以考虑，这些测试单元用于测试QEC或裸机配置中配备螺旋桨的涡轮螺旋桨发动机。该报告没有涉及设计用于测试带有测功机型负载吸收装置的涡轮螺旋桨发动机的测试单元的设计考虑，因为它们基本上是作为涡轮轴发动机进行测试的。AIR4989，参考文献2中介绍了这些测试单元的设计注意事项。 1.

This document is offered to provide state-of-the-art information about design factors that must be considered in the design of new or significantly modified engine test cells used to test propeller equipped turboprop engines in either QEC or bare engine configurations. The report does not address design considerations for test cells designed to test turboprop engines with dynamometer type load absorption devices because they are essentially tested as turboshaft engines. Design considerations for those test cells are presented in AIR4989, Reference 2.1.