Then a real-time quasi-steady turboshaft twin-engined model is founded by simulating the rotor speed fluctuation.为模拟大负载情况下旋翼转速的波动，建立了双发准定常涡轮轴发动机实时仿真模型。
For six hours we squatted among our equipment, deafened by the chopper's twin turboshaft engines, until we finally reached our distant goal in the middle of the endless taiga.我们蹲坐在设备周围，忍受著直升机双涡轮轴引擎震耳欲聋的噪音，终于在经过六小时的航程后，抵达位于广阔针叶林中的目的地。
