This thesis presents a comprehensive approach to developing and tuning a helicopter flight model for simulation of flight performance, with a focus on a prototype helicopter under development. Conducted at Zürich University of Applied Sciences (ZHAW), the research involves several key tasks aimed at refining the model to achieve satisfactory similarity with real-flight data. The thesis begins with a description of the helicopter flight model and its relevant sub-models, including aerodynamics, propulsion, controls, and dynamics. Subsequently, potential tunable parameters for the model are identified through analysis of its components. These parameters are then subjected to sensitivity analysis to understand their impact on stability and overall flight characteristics. Based on the sensitivity analysis results, recommendations are made for a list of parameters deemed suitable for tuning the helicopter flight model. The criteria for evaluation encompass the significance of each parameter in influencing flight performance and the feasibility of adjusting them to match real-flight behavior. This research contributes to the advancement of helicopter flight modeling by providing a systematic methodology for parameter identification, sensitivity analysis, and model tuning. The findings offer insights into enhancing the fidelity of helicopter simulation models, with implications for various applications including training, research, and development.