ChassisSim is a comprehensive lap time simulation software designed for the motorsport and automotive industries. Developed in the mid-1990s, it has continuously evolved to cater to a wide range of racing categories, including Formula E, open-wheelers like F3 and F2, sportscars such as LMP1 and LMP2, touring cars like NASCAR and V8 Supercars, and high downforce categories such as DTM and World Time Attack Challenge. Its versatile multi-body vehicle dynamic model allows users to simulate various vehicle types, including electric prototypes, rally cars, drift racers, and dirt racers. Key Features and Functionality: - Multi-Body Vehicle Dynamics Engine: Utilizes race data and transient simulation to provide accurate vehicle behavior predictions. - Driver-in-the-Loop and Lap-Time Simulation: Employs the same numerical engine for both simulations, ensuring consistency and eliminating discrepancies. - Data Export and Analysis: Allows exporting data to preferred analysis packages and overlaying with actual data to determine necessary car adjustments. - Online Simulation Access: Offers professional-grade simulation tools online at an affordable rate, enabling users to predict lap times, generate track maps, and model tire forces. Primary Value and User Solutions: ChassisSim empowers race engineers and teams to gain an in-depth understanding of their vehicles, facilitating informed decisions to optimize performance. By simulating various scenarios before race events, users can prepare effectively, reducing reliance on extensive physical testing. The software's consistent numerical engine across different simulation tools ensures reliable results, instilling confidence in critical car setup decisions. With over two decades of experience, ChassisSim has been instrumental in numerous racing successes, including victories at events like the 24 Hours of Le Mans and Daytona, the 12 Hours of Sebring and Bathurst, and the World Time Attack Challenge.