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).
Requesting a discussion and pedal ratio calculations for various all-hydraulic brake systems.
| Identifier | ExFiles\Box 121\1\ scan0273 | |
| Date | 13th May 1940 | |
| 1639 Rm{William Robotham - Chief Engineer}/MHR.{M. H. Rigby} from Rm.{William Robotham - Chief Engineer} Rm.{William Robotham - Chief Engineer}12/ML.13.5.40. I should like to discuss this letter from Parnell regarding the all-hydraulic brakes, with you. Will you please get out the pedal ratio for : 1. 7.B.V. as you have at present rigged it up. 2. The Lockheed with the twin master cylinder. 3. The figures given on the existing prints. Rm.{William Robotham - Chief Engineer} | ||