PROFESSIONAL MOTORSPORT
SIMULATION SOFTWARE
get a feel for LapSim and its approach
The software used for all the licenses is the same and available in the free download. Without a license you are limited in the amount of parameters which you can edit to describe your vehicle.
But even with this limited amount of setup parameters, you should be able to get the model relatively close to your real car. In this manner you can experience the functionality and approach of LapSim. Whether it is comprehensive for you, without purchasing a license.
Weight balance fixed at 52% to the front
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
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.
A positive coefficient means downforce, a negative creates lift.
6 speed gearbox with fixed ratios
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
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
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.
Capable of generating a power curve for the lap simulation
Also in the free version you are able to test und use the engine simulation program. It can help you to generate a power / torque curve for the lap simulation. The engine parameters you can adjust are limited to bore, stroke and amount of cylinders.
The camshaft characteristic is fixed in the free version.
It is always a 4 valve head, where the valve size, the diameter of intake runners and exhaust are adjusted by the chosen cylinder bore.
By changing the bore/stroke ratio, you can shift the peak power point. This effect can be seen in the three power curves on the right. All are 2 litre, just the different bore/stroke ratio is changed.
To scale the power curve to fit your vehicle, change the capacity and/or amount of cylinders.
It will at least give you a feel of the engine simulation model.
full functionality in free version mode
Also in the free version mode, you have the full functionality of the 7 poster model.
So you can experience the approach, the capabilities as well as the limitations of the model.
Shockabsorbers
In order to do get a proper felling for the model, you can chose between the 5 settings of the shockabsorber characteristics.
In the free version mode LapSim defines the shockabsorber characteristics to the vehicle weight and spring stiffness.
They go from under-critical to over-critical, for both the bump as well as the rebound characteristics.
Hereby you can properly analyse what the effect is on the behaviour of the model.