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).
Issues with the floating fulcrum brake, detailing tests to reduce jaggering.
| Identifier | ExFiles\Box 22\1\ Scan046 | |
| Date | 12th July 1923 | |
| R.R. 499A (40 H) (EL 42 12-7-23). J.H. D.{John DeLooze - Company Secretary} 74214 EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs{Lord Ernest Hives - Chair}2/TS.12.23. 74214 To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. CJ. RG.{Mr Rowledge} c. HY.{Tom Haldenby - Plant Engineer} Da.{Bernard Day - Chassis Design} RE BRAKES. On the floating Fulcrum brake, even when we have had the full length of Ferodo, we have never been able to get this brake effective, except when the leverage has been increased to such an extent that we have had practically no clearance. So far we do not appear to have obtained any wrapping effect with the floating fulcrum. We have tried the same methods of bedding which make the ordinary brakes very effective. As we cannot see any reason for this, we propose testing these brakes on our dynamometer test. We have recently taken a standard front wheel brake which was jaggering and reduced the Ferodo from the toggle and 4ft the wrapping shoe only in ½" stages. We found after we had removed 2½" we could still obtain jaggers. With 3" removed, we had very slight occasional jaggers. With 3½" removed, there were no jaggers and very little braking. We had reduced the braking at least 50%. We are proceeding to test shoes on the floating fulcrum brakes, in which the shoes are sawn apart and linked together. Contd. | ||