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).
Troubleshooting brake system operation and noise, with proposed solutions involving stops and dampers.
| Identifier | ExFiles\Box 5\3\ 03-page280 | |
| Date | 3rd October 1935 | |
| -2- arm does not return to its zero point. We find however, that if we fit a stop to the front equaliser shaft, the trouble which at present occurs when the swinging arm friction increases temporarily, is overcome. The stop itself requires cushioning with a piece of Ferodo and the attached sketch indicates the manner in which this has been carried out. Having silenced the servo, the noise of the brake pedal hitting its stop becomes very noticeable, but can easily be cured by a pad of Ferodo on the stop. We attach a report from CWH. on these stops and also on a dash pot which he tried out and which appears to be an almost complete solution to the trouble. We recommend that some scheme should be got out to reduce the noise of the brake release. To make it work satisfactory, it was found necessary to fit a damper stop to He/Sh/31 front brake equalising shaft and to take all slack out of the rear brake ropes, otherwise a lag occurred which could be felt as the brakes were applied. Under these conditions no noise is obtainable from the servo leverages, but a distinct metallic noise comes from the foot pedal, and from the front and rear brake levers. The adjustment will have to be correct to obtain these results. We have tried an improved dash pot damper which is a distinct improvement over the fitting of the stops. | ||