A typical flight simulator consists of models of various elements such as the flight dynamic model, filters and actuators, which have fast and slow eigen values in the overall system. This results into an electromechanical control system of stiff ordinary differential equations. Stability, accuracy and speed of computation are the parameters of interest while selecting numerical integration schemes for use in flight simulators. Similarly, accessing huge aerodynamic and engine database in table look-up format at high speed is an essential requirement for high fidelity real time flight simulation. A study was carried out by implementing well known numerical integration and table lookup techniques in a real time flight simulator facility designed and developed in house. Table lookup techniques such as linear search and index computation methodology using novel Virtual Equi-Spacing concept were also studied. It is seen that the multi-rate integration technique and the table look up using Virtual Equi-Spacing concept have the best performance amongst the techniques studied
