Document ID: chunk:federal_register_of_legislation:F2021C01192:body:0:p27
Version: federal_register_of_legislation:F2021C01192
Segment Type: other
Provision Reference: 
Character Range: 73540–76654

diagonal split).............
  8. Declaration of which is the secondary braking system..................
  9. Specifications of brake valves (if applicable)........................
  9.1. Adjustment specifications of the load sensing valve...................
  9.2. Setting of pressure valve.....................................
  10. Designed brake force distribution...............................
  11. Specification of brake.......................................
             11.1. Disc brake type (e.g. number of pistons with diameter(s), ventilated or solid disc)
             11.2. Drum brake type (e.g. duo servo, with piston size and drum dimensions).....
             11.3. In case of compressed air brake systems, e.g. type and size of chambers, levers, etc.
  12. Master cylinder type and size..................................
  13. Booster type and size.......................................
Annex 2
  Arrangements of approval marks
Model A
(See paragraph 4.4. of this Regulation)
       The above approval mark affixed to a vehicle shows that the vehicle type concerned has, with regard to braking, been approved in the United Kingdom (E 11) pursuant to Regulation No. 13-H under approval number 012439. The first two digits of the approval number indicate that the approval was granted in accordance with the requirements of the 01 series of amendments to Regulation No. 13-H.
Model B
(See paragraph 4.5. of this Regulation)
        The above approval mark affixed to a vehicle shows that the vehicle type concerned has been approved in the United Kingdom (E 11) pursuant to Regulations Nos. 13-H and 24.[9] (In the case of the latter Regulation the corrected absorption coefficient is 1.30 m-1). The approval numbers indicate that, at the dates when the respective approvals were given, Regulation No. 13-H was in its original form and Regulation No. 24 included the 02 series of amendments.

Annex 3
  Braking tests and performance of braking systems
1.   Braking tests
1.1. General
1.1.1.  The performance prescribed for braking systems is based on the stopping distance and the mean fully developed deceleration. The performance of a braking system shall be determined by measuring the stopping distance in relation to the initial speed of the vehicle and/or by measuring the mean fully developed deceleration during the test.
1.1.2.  The stopping distance shall be the distance covered by the vehicle from the moment when the driver begins to actuate the control of the braking system until the moment when the vehicle stops; the initial speed shall be the speed at the moment when the driver begins to actuate the control of the braking system; the initial speed shall not be less than 98 per cent of the prescribed speed for the test in question.
The mean fully developed deceleration (dm) shall be calculated as the deceleration averaged with respect to distance over the interval vb to ve , according to the following formula:

              Where:
               vo = initial vehicle speed in km/h,
              vb = vehicle speed at 0.8 vo in km/h,
               ve = vehicle speed