HADRON: DEVELOPED FOR PROJECT MOTOR RACING

March 18, 2025

So what’s powering the handling you’re going to feel in Project Motor Sport? The internal name at Straight4 is “Hadron”. Hadron is the new modular vehicle dynamics platform developed specifically from the ground-up for Project Motor Racing.

See the Hadron Inspector at work.

• First principle physics engine delivers unmatched handling realism at 720Hz
• A new open topology multi-body vehicle solver
• Internal combustion engine and turbocharger model using a one-dimensional compressible fluid dynamic simulation that allows for effects like turbo lag or backfires, and defects like dieseling or knocking, with exhaust gas that impairs the virtual airspace around the car
• More natural, non-linear throttle control due to torque response that is dynamically emerging from the fluid and combustion simulation
• Modular drivetrain, running at 7,200Hz, supporting all clutch, differential and gearbox configurations
• Accurate FFB taken directly from the tie rod
• Piecewise aerodynamics model where wings, winglets or the undertray can affect each other

Fully dynamic tyre simulation, comprising:

• Carcass simulation using a finite-element approach for full elastic modelling with emergent behaviours such as vibration, telescoping, and twisting
• Tread simulation that includes a discretised 2D contact patch, running at up to 10,000Hz, featuring tread channels for realistic water handling and aquaplaning
• Simulated steering rack used for reporting force feedback provides a detailed and nuanced handling feel for the driver

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