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).
The advantages of a suggested method for operating 4-wheel brakes.
| Identifier | WestWitteringFiles\K\December1923\ Scan53 | |
| Date | 12th July 1923 | |
| R.R. 493A (40 H) (SL 12-7-23). J.H., D.{John DeLooze - Company Secretary} ORIGINAL Expl. No. 9940 REF: Hs{Lord Ernest Hives - Chair}3/LCV.12.23. K9910 EXPERIMENTAL REPORT. To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. c. to De. c. to Rg.{Mr Rowledge} 4-WHEEL BRAKES. Herewith description of a method of operating 4-wheel brakes suggested by my assistant Mr. Lovesey. The chief advantages possessed by this system of operation seem to be as follows :- (1) Reduction of work done by the Servo. By arranging the linkage the ratio of work done by servo to work done by 'direct' foot pressure may be adjusted to any desired quantity (2) The condition or wear of the brakes could be felt on the foot pedal which would not be the case when acting directly through the 'servo'. (3) The direct pressure operation is entirely independent of the action of the servo i.e. if the servo is not working or operating in the reverse direction, the total foot pressure is available for braking. (4) On applying the brakes backward backlash in the system would be taken up before the servo exerted its pull. This would probably reduce the inertia effects. The action of the system would, I believe, approximate to the Hispano effect. ACL. | ||