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).
Hand brake ratio of the Phantom III and proposing the use of a high-friction material for the brake shoes.
| Identifier | ExFiles\Box 92\4\ scan0167 | |
| Date | 11th March 1936 | |
| x306 Rm{William Robotham - Chief Engineer} MARTINDALE HS.{Lord Ernest Hives - Chair} c. By.{R.W. Bailey - Chief Engineer} Mx.{John H Maddocks - Chief Proving Officer} Da.{Bernard Day - Chassis Design} HDY.{William Hardy} E.3/HP.11.3.36. re Phantom III Hand Brake. With reference to the above, with a brake lever movement of 8" we have a ratio of 60 to 1 on the hand brake compared with 80 to 1 on the Phantom II. It would, therefore, appear that we can recapture this loss by using the high μ material on the hand brake shoes. If you are in agreement with this will you please let me have particulars of the brake material in question, so that we can instruct accordingly. E.{Mr Elliott - Chief Engineer} | ||