2. INSTALLATIONS, PROCEDURES AND MEASURING INSTRUMENTS
2.1. Testing ground
The test area shall be large enough to accommodate the run-up track, barrier and technical installations necessary for the test. The last part of the track, for at least 5 m before the barrier, must be horizontal, flat and smooth.
2.2. Barrier
The barrier consists of a block of reinforced concrete not less than 3 m wide in front and not less than 1.5 m high. The barrier must be of such thickness that it weighs at least 70 tonnes. The front face must be vertical, perpendicular to the axis of the run-up track, and covered with plywood boards 2 cm thick in good condition. The barrier shall be either anchored in the ground or placed on the ground with, if necessary, additional arresting devices to limit its displacement. A barrier with different characteristics, but giving results at least equally conclusive, may likewise be used.
2.3. Propulsion of vehicle
At the moment of collision, the vehicle must no longer be subject to the action of any additional steering or propelling device. It must reach the obstacle on a course perpendicular to the collision wall; the maximum lateral misalignment tolerated between the vertical median line of the front of the vehicle and the vertical median line of the collision wall is ± 30 cm.
2.4. State of vehicle
2.4.1. The vehicle under test shall either be fitted with all the normal components and equipment included in its unladen kerb weight or be in such condition as to fulfil this requirement so far as the components and equipment affecting fire risks are concerned.
2.4.2. If the vehicle is driven by external means, the fuel installation must be filled to at least 90 per cent of its capacity either with fuel or with a non-inflammable liquid having a density and a viscosity close to those of the fuel normally used. All other systems (brake fluid header tanks, radiator, etc.) may be empty.
2.4.3. If the vehicle is driven by its own engine, the fuel tank must be at least 90 per cent full. All other liquid-holding tanks may be filled to capacity.
2.4.4. If the manufacturer so requests, the technical service responsible for conducting the tests may allow the same vehicle as is used for tests prescribed by other Regulations (including tests capable of affecting its structure) to be used also for the tests prescribed by this Regulation.
2.5. Velocity on collision
The velocity on collision must be between 48.3 km/h and 53.1 km/h. However, if the test has been carried out at a higher collision velocity and the vehicle has satisfied the conditions prescribed, the test shall be considered satisfactory.
2.6. Measuring instruments
The instrument used to record the speed referred to in paragraph 2.5. above shall be accurate to within one per cent.
3. EQUIVALENT TEST METHODS
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