Racing Cars and Vehicles


iRacing laser scanned cars

Most software packages that could be considered racing simulations, have progressed to the point where the cars look real. The question is: Do they feel real? Realistic driving dynamics start with accurate data. That is why works closely with major auto manufacturers and race car constructors to gather exact masses and dimensions for vehicle components, whether output directly from CAD data, collected through three-dimensional laser scanning, or physically disassembling the vehicle to weigh and measure parts of the chassis, suspension and driveline.

But in the same way that a race car is not just a collection of parts, an accurate simulation is not just an assembly of data. Both are active and dynamic. Thanks to the iRacing physics engine and tire model, that data comes alive. It is no longer just a graphical representation of a stock car, formula car or sports car. It is now a complex set of interrelated mechanical systems influencing a myriad of ever-changing forces to control physical consequences. It feels real because, mathematically, it is real.

A critical difference between past products and the hyper-accuracy achieved by iRacing is the sophistication of their physics engine. The iRacing team are among the world’s leading experts in the mapping of multi-body systems and the calculation of forces and their effects on motion. Their relentless search for accuracy has led to the creation of a new, proprietary tire model, this model replicates tire forces over a wide range of speeds and loads, adding an important dimension to the accuracy of the experience by using the TrackDay motor racing simulator’s traction-loss and yaw capabilites.