PROFESSIONAL MOTORSPORT

SIMULATION SOFTWARE

Enough parameters to get a correlation with reality

Printscreen of the LapSim setupoverview in the free version mode

In order to post process on-car recorded data or to run any simulation, you need a setup file specifying your vehicle.

By selecting "Setup Sheet" under "Chassis Parameters", you see all the vehicle parameters you can vary in the Free Version Mode.

These parameters should enable you to get the model relatively close to your real car. In this manner you can experience the functionality and approach of LapSim, without purchasing a license.

Weight balance fixed at 52% to the front

Printscreen of part of the LapSim setup overview in free version mode

The weight balance is fixed in free version mode to 52% front. Total weight and wheelbase are straight forward. Trackwidth needs to be taken from centre tire to centre tire.

Centre of gravity needs to be specified compared to the road surface. Changing the rideheights will change the centre of gravity height.

However, in the free version mode, the axle rideheights do not have an influence. They make the results more realistic in case of a (high) downforce car.

Aerodynamics are not rideheight dependent

Printscreen of part of the LapSim setup overview in free version mode

Aerodynamics are specified with two downforce and a drag coefficient. These are multiplied with the frontal area of the vehicle, the square of the vehicle speed and the density of air (1.25).

A positive coefficient means downforce, a negative creates lift.

6 speed gearbox with fixed ratios

Printscreen of part of the LapSim setup overview in free version mode

In the free version mode, the model uses a 6 speed gearbox with fixed gear ratios. Drivetrain efficiency is also fixed at 90%.

The final drive ratio and the effective tire radius can be change, to adapt the gearbox to your vehicle. In addition you can adjust the gearshift times.

No third elements, no helper springs or bumpstops

Printscreen of part of the LapSim setup overview in free version mode

In the free version the model uses only corner springs, without a helper spring. You have to specify the stiffness of the springs as well as the ratio to the wheel travel.

In addition you can adjust the stiffness of anti-roll bars. The stiffness of the ARB is relative to wheel travel.

Tires characteristics are defined by friction coefficient

Printscreen of part of the LapSim setup overview in free version mode

In the Free version mode, the tire characteristics are defined by one single the tire grip factor. The same for front and rear tires.

Although not adjustable in free version mode, the tire characteristics have a camber dependency. This gives the opportunity to analyse the influence of adjusting the individual camber settings.

Steering ratio is necessary for on-car data

Printscreen of part of the LapSim setup overview in free version mode

LapSim calculates with a constant brake balance, which is adjustable. Which brake balance gives the best laptime, dependents on vehicle setup as well as the track layout.

The steering ratio is only there to enable a good comparison between on-car recorded data and simulation results.

Engine characteristics defined in 500 [rpm] steps

Printscreen of engine torque and power curve in the free version mode

In the free version, the power / torque curve are specified in 500 [rpm] steps.

By clicking on either the power or torque curve you can choose what you want to specify. LapSim also selects the rpm around the position you clicked in the graph.