How we do it
Unlike the statistic test, the vehicle moves in this test. The test is also used to verify a particular load securing system. In that case the combination of load, truck and load securing devices are being tested.
When performing a dynamic XL test (in order to obtain a universal XL certificate) the vehicle must carry a non-stable transversal load. Then the vehicle must be provided with the required data logging equipment. Then we can measure the accelerations achieved during the test.
A number of the manoeuvres to be executed can result in vehicle accelerations that almost make it tip. It is therefore recommended to equip the vehicle with stand wheels. Once this setting is done, a number of manoeuvres must be executed:
- Drive forwards at a sufficiently high speed and then brake ‘hard’. An 8m/s² acceleration must be recorded during a sufficiently long time.
- Drive backwards and then brake. A 5m/s² acceleration must be recorded during a sufficiently long time.
- Take a roundabout at a sufficiently high speed. A 5m/s² transversal acceleration must be recorded during a sufficiently long time.
- Execute an S-shaped manoeuvre with braking manoeuvre in the end. Moreover, a 5m/s² transversal acceleration must be measured in both directions, followed by a 5m/s² acceleration during the braking process.
If the plastic and elastic deformation of the walls remains within limits, the vehicle is granted the XL certification for an equivalent freight. (Weight and stability)
Check out the video below!