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).
Efforts and experiments to cure rear wheel brake squeaks.
| Identifier | ExFiles\Box 12\5\ 05-page273 | |
| Date | 1st April 1931 | |
| W/S. To Pn.{Mr Northey} From Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}6/KT.1.4.31. RE. REAR WHEEL BRAKE SQUEAKS P.II. In answer to your Pn.{Mr Northey}2/WT.27.3.31. at the moment we have not got anything to cure rear brake squeaks. We tried out some time ago the abandoning of the segments similar to front brakes and using the spiral spring only. The results were not at all beneficial. The Hancock type as not as yet been tested, the brake shoes are now being machined and we should have the brakes on test in the next week or so. A considerable amount of work has been done to try and eliminate the rear brake squeaks, but so far none have been promising. In regard to future cars we have been trying ribbed brake drums made in steel and cast iron. The steel brake drums although they give us an increased efficiency in the braking have not in any way eliminated squeaks. The cast iron brake drums gave us very promising results both as regards efficiency and squeaks, but unfortunately this metal has failed, deep surface cracks having appeared on the braking surfaces. We are still persevering with our troubles, but at the present moment we cannot say that we have got any definite results. Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} | ||