It can be useful to know the forces acting on the front and rear axles. Not only it will tell you if you can do a wheelie or not, but it it can also be useful when designing the suspension for high speed conditions (especially with high downforce).

The load on the front axle ( W_f ) is: (more)

Wf Fv = lr / L  −  KL CLf / CL 1 − KL − [ Ft ( 1 − KL ) mg − fr ] h L

(1)

Where:

KL = 0.5ρCLAv2 mg

And:

ρ	= atmospheric air density (= 1.225 kg/m³)
CLA	= Lift factor
m	= vehicle mass
g	= gravitational acceleration (= 9.80665 m/s²)
fr	= rolling resistance coefficient
lr / L	= portion of the vehicle's weight on the front axle
h / L	= CG-height-to-wheelbase ratio
CLf / CL	= portion of the vehicle's aerodynamic lift on the front axle

As for F_t , it is the smallest value found with equation (1) from either the Power Limited page or the Traction Limited page.

Equation (1) cannot exceed 100% and has to be greater than, or equal to, 0%.

Equation (3a) from the braking page still applies to find the load on the rear axle ( W_r ):

Wr Fv = 1 − Wf Fv

(2)

To find the loads with respect to the vehicle's weight (as plotted on the graph on the ACCELERATION SIMULATOR), knowing the vertical force (F_v) already defined, we do the following transformation:

Wf mg = Wf Fv Fv mg = Wf Fv ( 1 − KL )

Similarly:

Wr mg = Wr Fv ( 1 − KL )