Document ID: chunk:federal_register_of_legislation:F2006L03056:body:0:p14
Version: federal_register_of_legislation:F2006L03056
Segment Type: other
Provision Reference: 
Character Range: 39528–42521

must not exceed one and a half times the horizontal distance from the centre of mass to the nearest roll axis (d) (See Figure 5).
22.3.                                Test procedure for determining the vehicle's centre of mass
22.3.1.                          Unless otherwise 'Approved', the location of the vehicle's centre of mass must be determined by the method described below.
22.3.2.                          Transverse location
22.3.2.1.                    The transverse location of the centre of mass can be taken to be located along the vehicle's longitudinal centreline.

22.3.3.                          Longitudinal location (See Figure 3)
22.3.3.1.                    The longitudinal location (L) of the centre of mass, from the centre line of the front 'Axle', is determined from the formula
where:
W is the wheelbase
R is the rear 'Axle Load' on the tyre(s) with the vehicle in the 'Maximum Loaded Test Mass' condition
F is the front 'Axle Load' on the tyre(s) with the vehicle in the 'Maximum Loaded Test Mass' condition
22.3.4.                          Height Location (See Figure 4)
22.3.4.1.                    For LEM1, LEP1 & LEG1 vehicles - with the vehicle standing on a level surface, mark a horizontal line parallel to the vehicle longitudinal centreline, passing through the centre of the vehicle rear 'Axle' - this is the reference line.
22.3.4.2.                    For LEM2, LEP2 & LEG2 vehicles - with the vehicle standing on a level surface, mark a horizontal line parallel to the vehicle longitudinal centreline, passing through the centre of the vehicle front 'Axle' - this is the reference line.
22.3.4.3.                    For LEM1, LEP1 & LEG1 vehicles chock both rear wheels.
22.3.4.4.                    For LEM2, LEP2 & LEG2 vehicles chock both front wheels.
22.3.4.5.                    For LEM1, LEP1 & LEG1 vehicles raise the front of the vehicle until the centre of mass is directly over the rear 'Axle'.
22.3.4.6.                    For LEM2, LEP2 & LEG2 vehicles raise the rear of the vehicle until the centre of mass is directly over the front 'Axle'.
22.3.4.7.                    Measure the angle between the reference line and the horizontal (See Figure 4).
22.3.4.8.                    The height of the centre of mass is given by the formula:
22.3.4.8.1.              For LEM1, LEP1 & LEG1 vehicles
where:
r is the rolling radius of the tyre fitted to the wheel
22.3.4.8.2.              For LEM2, LEP2 & LEG2 vehicles
h = r +(L / tan  )
where:
r is the rolling radius of the tyre fitted to the wheel

22.3.5.                          The horizontal distance from the centre of mass to the nearest roll axis (dimension "d") is calculated from the formula shown below:
22.3.5.1.                    For LEM1, LEP1 & LEG1 vehicles
where:
d is the horizontal distance from the centre of mass to the nearest roll axis
t is the width of the wheel track of the rear 'Axle'.
22.3.5.2.                    For LEM2, LEP2 & LEG2 vehicles
where:
d