{
  "engine": "Project Chrono / PyChrono",
  "engine_version": "9.0.1",
  "experiment": "wheel rolling on a flat surface in a ramp-aligned gravity frame",
  "material_density_kg_m3": 7800.0,
  "ramp_angle_deg": 15.0,
  "gravity_m_s2": 9.81,
  "contact_friction": 1.5,
  "duration_s": 0.8,
  "time_step_s": 0.001,
  "initial_x_m": -0.4,
  "required_relative_displacement_gain": 0.10,
  "maximum_relative_mass_change": 1e-6,
  "maximum_outer_diameter_change_mm": 1e-6,
  "maximum_rolling_slip_ratio": 0.02
}