Document ID: chunk:federal_register_of_legislation:F2006L01788:front:0:p6
Version: federal_register_of_legislation:F2006L01788
Segment Type: other
Provision Reference: 
Character Range: 17145–20275

breaking energy is not achieved, then the required minimum breaking energy is deemed to have been achieved at that point.
23.3.3.2.3.              Compute the breaking energy for each test point by means of the following formula:

         W = F  P
          2,000

         where:
          W = Energy, joules
          F = Force, newtons
          P = Penetration, mm.
23.3.3.2.4.              Determine the breaking energy value for the tyre by computing the average of the 5 values obtained in accordance with clause 23.3.3.2.3.
23.3.4.                          Tyre Endurance Test
23.3.4.1.                    Preparation of tyre
23.3.4.1.1.              Mount a new tyre on a 'Test Rim' and inflate it to the applicable pressure specified in clause 23.3.1.1.2.
23.3.4.1.2.              Condition the tyre assembly at a temperature not less than 35oC for at least 3 hours.
23.3.4.1.3.              Readjust tyre pressure to that specified in clause 23.3.1.1.2 immediately before testing.
23.3.4.2.                    Test procedure
23.3.4.2.1.              Mount the tyre and 'Test Rim' assembly on a test axle and press it against a flat-faced steel test wheel of an outside diameter not greater than 1.71 metres and at least as wide as the 'Section Width' of the tyre to be tested, or an 'Approved' equivalent test wheel.
23.3.4.2.2.              During the test the ambient temperature at a distance of not less than 150 mm and not more than one metre from the tyre shall be at least 35oC.  No provision is to be made for cooling the tyre during the test.
23.3.4.2.3.              Conduct the test at not less than 80 km/h test speed with loads and test periods not less than those shown in the following schedule:-
                                                   TEST PERIODS
                                                   (1) for 4 hours  (2) for 6 hours  (3) for 24 hours
Test Loads as Percentage of 'Maximum Load Rating'

                                                   85.0 %           90.0 %           100 %

23.3.5.                          High Speed Test
23.3.5.1.                    Preparation of tyre
23.3.5.1.1.              Mount the tyre on a 'Test Rim' and inflate it to a pressure equal to the pressure specified in the 'Nominated Standard' for its 'Maximum Load Rating' plus an increase no greater than that specified in Table 1 for its 'Speed Category'.
23.3.5.1.2.              Condition the tyre assembly at a temperature not less than 35oC for at least 3 hours.
23.3.5.1.3.              Readjust the tyre pressure to that specified in clause 23.3.5.1.1 immediately before testing.
23.3.5.2.                    Test procedure
23.3.5.2.1.              Mount the tyre and 'Test Rim' assembly on a test axle and press it against a flat-faced, steel test wheel of an outside diameter not greater than 1.71 metres, and at least as wide as the 'Section Width' of the tyre to be tested (or an 'Approved' equivalent test wheel) with a load not less than the percentage of the 'Maximum Load Rating' of the tyre,
         'Speed Category' "H" and below  - 80.0%
         'Speed Category'  "V" - 72.8%