A governor regulates an engine's mean speed by adjusting the supply of working fluid based on load variations, using centrifugal forces from revolving balls. The balls rise or fall with spindle speed changes, automatically controlling the fluid supply to maintain speed within limits. This work is primarily based on Structural Design study using Mathematical Modelling and Simulation based on ANSYS Workbench, through recursive modelling. In this study structural integrity of a three-flyball Watt governor is compared with the two-flyball Watt governor. This study analyses the modern top-to-bottom design approach based on ASTM principles coupled with numerical analysis and Computer Aided Engineering to solve this modern-day problem. The results acknowledge the fact that the three-flyball version would lead to a reduction in the maximum stress produced at various parts of the machine and thus would be a better choice structurally, if not monetarily. The two-flyball version is designed to entail two 5 kg flyballs whereas the three-flyball version entails both three-flyballs with three 5 kg flyballs and three flyballs with three 3.3 kg flyballs. The result concludes that the three flyball with 5 kg flyballs each would turn out to be the optimum choice in case of longevity and structural performance.