Document ID: chunk:federal_register_of_legislation:F2017L01344:body:0:p26
Version: federal_register_of_legislation:F2017L01344
Segment Type: other
Provision Reference: 
Character Range: 68088–70815

pursuant to Regulation No. 17 with regard to the strength of any seats on the vehicle which are not fitted or capable of being fitted with head restraints.
Model D
(see paragraphs 4.5. of this Regulation)

Vehicle with seats not fitted or not capable of being fitted with head restraints
        a = 8 mm min.

The above approval mark when affixed to a vehicle shows that the vehicle type has seats not fitted or capable of being fitted with head restraints, and was approved in the Netherlands (E 4) pursuant to Regulations Nos. 17 and 33.1 The approval numbers indicate that, on the dates when approval was granted, Regulation No. 17 included the 08 series of amendments but Regulation No. 33 was still in its original form.

Annex 3
  Procedure for determining the "H" point and the actual torso angle for seating positions in motor vehicles[7]
                  Appendix 1 - Description of the three dimensional "H" point machine1
  Appendix 2 - Three-dimensional reference system1
  Appendix 3 - Reference data concerning seating positions1

Annex 4
  Determination of the height and width of head restraints
Figure 1

       Figure 2

Annex 5
  Details of lines and measurements taken during tests

1. Original unloaded position.
2a.  Displaced position by applying to the manikin's back a moment of 373 Nm
 about the R point, defining the position of the displaced reference line r1.
           2b. Displaced position by applying to the 165 mm sphere a force F producing a moment of 373 Nm about the R point, keeping the displaced reference line r1 in place.
3. Position after displacement by the force F increased to 890 N.

Annex 6
  Test procedure for checking energy dissipation
1. Installation, test apparatus, recording instruments and procedure
1.1. Setting up
 The seat, as mounted in the vehicle, shall be firmly secured to the test bench with the attachment parts provided by the manufacturer, so as to remain stationary when the impact is applied.
 The seat-back, if adjustable, shall be locked in the position specified in paragraph 6.1.1. of this Regulation.
 If the seat is fitted with a head restraint, the head restraint shall be mounted on the seat-back as in the vehicle. Where the head restraint is separate, it shall be secured to the part of the vehicle structure to which it is normally attached.
 If the head restraint is adjustable, it shall be placed in the most unfavourable position allowed by its adjusting systems.
1.2. Test apparatus
1.2.1. This apparatus consists of a pendulum whose pivot is supported by ball‑bearings and whose reduced mass[*] at its centre of percussion is 6.8 kg. The lower extremity of the pendulum consists of a rigid headform 165 mm in diameter whose centre is