Rotorcraft Conceptual Design Methodology by Using Fully Parametric CAD Model with Embedded Empirical Formulations

Rotorcraft design needs a synchronous design method that connects different design decisions. This is due to the reciprocal nature of design drivers, and their corresponding consequences. Therefore, there is a need for a comprehensive design methodology that includes and connects different design considerations including performance, configuration, ergonomics etc. This paper introduces a rotorcraft design methodology which utilizes a fully parametric computer aided design (CAD) model. In the CAD model, performance calculations, weight estimations, and volume allocations are empirically formulated, and embedded into the model. This study enlarges the boundaries of conceptual design scope as it includes ergonomics factors such as pilot view angle, seating types and seating configurations. Moreover, alternative landing gear configurations, fuel tank configurations, different cabin types and design choices with their corresponding effects on weight and performance are discussed.