Document ID: chunk:federal_register_of_legislation:F2024L01742:body:0:p10
Version: federal_register_of_legislation:F2024L01742
Segment Type: other
Provision Reference: 
Character Range: 29473–32823

tests — Instrumentation); or

              6.     ISO 6487:1980 (Road vehicles – Techniques of measurement in impact tests – Instrumentation).

              1.                               The characteristics of the deceleration of the test rig must be determined from the accelerations measured on the rigid frame of the testing platform using a measurement system with a CFC of 60.

              2.                               The readings of the measuring devices in the 'Hybrid III' must be recorded through the independent data channels of the CFC specified in clauses 7.6.1 to 7.6.4.

              3.                               After the test any structural part of the 'Seat' or accessories above a horizontal plane 400 mm above the 'Reference Plane' which has any fracture or sharp or pointed edges or corners which is contactable by a sphere 165 mm in diameter must present a radius of curvature of at least 5 mm.

              4.                               'Seat' adjustment and locking systems are not required to be in full working order after the test.

 1.                                     Measurements to be made - Specific

     1.                               In the case of measurements in the head of the 'Hybrid III', the resultant tri-axial acceleration referring to the centre of gravity (r) must be measured in accordance with the following clauses.

         1.                         The acceleration must be measured with a CFC of 600.

         2.                         The acceleration must be expressed in g
            (g = 9.81 m/s2).

         3.                         The scalar value of  must be calculated according to the formula:
            r2 = 12 + v2 + t2
            where:
            1 = value of instant longitudinal acceleration
            v = value of instant vertical acceleration
            t = value of instant transversal acceleration.

     2.                               In the case of measurements in the thorax of the 'Hybrid III', the resultant acceleration at the centre of gravity must be measured with a CFC of 180.

     3.                               In the case of measurements in the femur of the 'Hybrid III', the axial compression force must be measured with a CFC of 600.

     4.                               Measurements in the sternum of the 'Hybrid III' must be measured according to the requirements of Part 572, Subclause E referred to in FMVSS 208 Issue 4 December 1989.

 2.                                     Dynamic Tests - unrestrained Occupant Loading

     1.                               This test must be conducted to demonstrate that the 'Seat' is capable of withstanding the loads imposed by unrestrained occupants in the 'Seat' behind, in addition to the restrained occupant loading.

     2.                               'Seat Types' tested to clause 7.2.2.2 or as specified in clause 7.2.3 are not required to meet this test.

     3.                               This test does not require the injury criteria of clause 9 to be measured.

     4.                               The 'Seats' to be tested must be prepared in accordance with clause 7.2.

     5.                               Any dummy representative of the 50th percentile adult male may be used.  For example, this may be a 'Hybrid II',