65034 - Basics of Turboshaft Engine Cycle Design and Optimization 

Hot and high performance is key for helicopters and hence the engine cycle design strategy needs careful consideration. This two hour tutorial session will provide an introduction to engine cycle design and optimization process, whilst overviewing the key drivers behind cycle selection. In the session, firstly the helicopter requirements (missions and point performance), military versus civil or dual usage issues, together with one engine versus two engine considerations will be discussed, different engine architectures will be looked at. Secondly, the session will introduce the engine rating structure and the limits, whilst walking through the steps of cycle design and optimization process. Finally, the major key drivers like growth potential, family concept, derivative engine strategies and future vertical lift - fast rotorcraft concepts will be presented. This tutorial of basics is perfect for anyone new to helicopter engine or wishing to expand their basic knowledge in this area. Key learning objectives: 1) Identify different types of helicopter platforms and their missions. 2) Explain the rating structure. 3) Address different types and architectures of turboshaft engines. 4) Identify the engine cycle selection criteria. 5) Explain how the engine limits are defined. 6) Explain how the growth potential and family concept affect the cycle design.