Document ID: chunk:federal_register_of_legislation:F2012C00535:front:0:p25
Version: federal_register_of_legislation:F2012C00535
Segment Type: other
Provision Reference: 
Character Range: 69218–72151

of rotation  parallel to the longitudinal axis of the multi-axle section of the vehicle, and passing through the points of  contact of the tyres of that section.

       3. Test procedure, test process

       3.1. The rollover test is a very rapid, dynamic process having distinguishable stages, should be taken into consideration when a rollover test, its instrumentation and  measurement are planned.

       3.2. The vehicle shall be tilted without rocking and without dynamic effects until it reaches unstable equilibrium and commences its rollover.  The angular velocity of the tilt platform shall not exceed 5 degrees/sec. (0.087 radians/sec).

       3.3. For inside observation high-speed photography, video, deformable templates, electrical contact sensors or other suitable means shall be used to determine that the requirements of paragraph 5.1. of this Regulation has been met.  This shall be verified at any places of the passenger, driver's and crew compartment where the residual space seems to be endangered, the exact positions being at the discretion of the technical service.  At least two positions, nominally at the front and rear of the passenger compartment(s) shall be used.

       3.4. Outside observation and recording of the rollover and deformation process is recommended, which means the following:

       3.4.1. two high-speed cameras - one at the front and another at the rear .  They should be located far enough from the front and rear wall of the vehicle to produce a measurable picture, avoiding wide-angle distortion in the shaded area, as  shown in figure A5.3a.

       3.4.2. the position of the centre of gravity and the contour of the superstructure (see figure A5.2b), is marked by stripes and bands to ensure correct measurements on the pictures.

Figure A5.3a - Recommended field of view of outside camera

Figure A5.3b - Recommended marking of the centre of gravity position
and the contour of the vehicle

       4. Documentation of the rollover test

4.1. Detailed description of the tested vehicle shall be given by the manufacturer in which:

       4.1.1. all the deviations between the fully finished vehicle type in running order and the tested vehicle are listed.

       4.1.2. the equivalent substitution (in respect of mass, mass distribution and installation) shall be proved in every case, when structural parts, units are substituted by other units or masses.

       4.1.3. there is a clear statement of the position of centre of gravity in the tested vehicle which may be based on measurements carried out on the test vehicle when it is ready for test, or a combination of measurement (carried out on the fully finished vehicle type) and calculation based on the mass substitutions.

       4.2. The test report shall contain all the data (pictures, records, drawings, measured values, etc.) which show:

       4.2.1. that test was carried out according to this annex;