Determining weight transfer

Printscreen of the LapSim GUI showing part where the vehicle wheelbase, trackwidth and Centre of Gravity (COG) height can be specified

The lengths parameters, wheelbase, track width front and rear in combination with the height of the C.O.G. determine the weight transfer during braking, accelerating and cornering.

Automatically moves with changing the axle rideheights

3D Figure of a vehicle showing a side view with a plane through the front and rear rideheight

Through these two ride heights one could imagine a bottom plane. The height of the C.O.G. can be specified either relative to this bottom plane or relative to the road surface.

Changing the static rideheights of the vehicle will automatically change the C.O.G. height.

If leading edge point differ from axle rideheights

Printscreen of the LapSim GUI showing a side view of a 3D vehicle with the aero leading edge points highlighted as well as inputs for the aero leading edge points

It is possible to specify leading edge points for your aerodynamics, relative to the centre of the two axles. For the front leading age point, the distance in front of the front axle as well as the height relative to the bottom plane through the front and rear ride height. Similar approach for the rear diffuser.

Most common is to specify the aerodynamics simply by front and rear axle ride heights, which would mean all these leading edge parameters are zero.