From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Extract of statutory rules and orders from 1931 regarding motor car braking systems.
| Identifier | ExFiles\Box 102\3\ scan0147 | |
| Date | 1st January 1931 | |
| EXTRACT OF STATUTORY RULES AND ORDERS, 1931 No.4. 41. (a) A motor car shall be equipped with two entirely independent and efficient braking systems, or with one efficient braking system having two independent means of operation, in each case so designed and constructed that the failure of any single portion of any braking system shall not prevent the brakes on two wheels, or in the case of a vehicle having less than four wheels, on one wheel, from operating effectively so as to bring the vehicle to rest within a reasonable distance. Provided that in the case of a single braking system, the two means of operation shall not be deemed to be otherwise than independent solely by reason of the fact that they are connected either directly or indirectly to the same cross shaft. (b) In the case of a motor car having more than three wheels and equipped with two independent braking systems, each such system shall be so designed and constructed, that if the brakes thereof act either directly or indirectly on two wheels only, they shall act on two wheels on the same axle. (c) Where, in the case of a single braking system, the means of operation are connected directly or indirectly to the same cross shaft, the brakes applied by one of such means shall act on all of the wheels of the motor car directly and not through the transmission gear. (d) In all cases the brakes operated by one of the means of operation shall be applied by direct mechanical action without the intervention of any hydraulic, electric or pneumatic device. (e) In all cases the brakes operated by one of the means of operation shall act directly upon the wheels and not through the transmission gear. | ||