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引言运十二飞机是哈尔滨飞机工厂设计制造的,以客、货运输为主,兼顾农、林、物探、空投等任务的双发涡桨多用途飞机。根据美国轻型飞机适航条例FAR-23与FAR-135附录A的要求,该机进行了机翼水平失速,转弯失速及加速失速的飞行试验。对于多发动机飞机,还要进行单发失速的飞行试验。在演示关键发动机不工作的失速特性时,飞机应无过分的尾旋倾向,并且在对不工作发动机不施加功率的情况下,飞机应能安全改出。单发失速是失速特性试飞中较难的科目,它要求试飞员应具有一定的理论知识和较好的飞行素质。本文将结合运十二飞机的试飞实践,详细地介绍单发失速的准备、试飞驾驶技术和飞行试验结果,可供今后进一步研究参考。
Introduction Yun-12 aircraft is designed and manufactured in Harbin Aircraft Factory, mainly passenger and cargo transport, taking into account the dual-turboprop multi-purpose aircraft such as agriculture, forestry, geophysical exploration and airdrop. According to the requirements of the American Light Aircraft Airworthiness Regulation FAR-23 and FAR-135 Appendix A, the aircraft was subjected to flight tests of horizontal wing stall, cornering stall and acceleration stall. For multi-engine aircraft, but also for single-flight stalling flight test. In demonstrating the stalling characteristics of key engines that do not work, the aircraft should have no excessive tendency to maneuver, and the aircraft should be able to be safely replaced without applying power to the inactive engine. Single-stalled stall is the more difficult subjects of flight test, which requires test pilots should have a certain theoretical knowledge and better flight quality. This article will combine the 12 flight test flight practice, a detailed description of the single stall stalling preparation, test flight pilot technology and flight test results for future reference for further study.