Race simulation

Race sim

The Saber on five desert races, simulated every 0.02 miles. Pick a race, pick a setup, and the whole race reruns in your browser.

Estimated course. Every result below is model output from engineering estimates, not measured data.

Setup

Race weight Genset Pace plan Fast-section cap Genset mode Fuel capacity Refuel Regen share Genset failure Start time

Mile by mile

The race

Move across the charts to scrub the race.

Course

Waypoints joined by straight lines. The orange dot follows the scrubber.

Inputs

What the model assumes

Every vehicle value comes from the Saber engineering sheets. The tag shows its status: Confirmed and Sourced values are known; Confirm and Measure are estimates waiting on data.

Unknowns

Not known yet

Measured race weight and weight distribution; drag coefficient and frontal area.
The 2.8R genset's fuel map and its cooling at 75 kW (coolant heat may reach roughly 58 kW against the factory JL radiator); whether the generator and DC bus can carry 75 kW.
Generator efficiency map; the motor's real derate curve; battery discharge limit.
Class eligibility of a hybrid truck at these events.

Not modeled yet: wheel slip, rock-crawl gearing and heat, genset thermal derate, flats and repairs, driving at night.

Physics: wheel power = aero + rolling + grade; electrical demand = wheel power ÷ 0.87 + 2.5 kW accessories. Genset runs at its full rating (75 kW for the 2.8R, 50 kW for the QSF2.8) between 30% and 70% pack charge (thermostat) or follows demand (load-follow). Fuel uses 230 g/kWh and 0.93 generator efficiency for both, so the 2.8R burns 5.76 gal/h at full output versus 3.84. Below 3 mph sustainable speed counts as a DNF. Running out of fuel is flagged but the model keeps driving, as the engineering sheet does.