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).
Performance report on various chassis and suspension components including buffers, springs, shackles, brackets and jacks.
| Identifier | ExFiles\Box 108\3\ scan0234 | |
| Date | 9th May 1938 | |
| -9- RSD.126 Rear Bump buffers. These were satisfactory in action. One buffer split, but the general durability was superior to previous buffers run in France. RSL.91. Rear spring silentbloc bushes (front end). No trouble experienced. An experiment with plain bushes showed that these gave slightly less sideways shake of the rear axle. Threaded shackles are recommended but not yet available. FCS.73. Rear spring threaded shackles. (rear end). These were most satisfactory. The rubber washers were effective in forming an oil seal, and preventing dirt and moisture from entering the shackle. It should be noted that if the shackles are dismantled it is advisable to use new rubber washers when re-assembling. Woodhead rear road springs Lot.FF.1263. These were satisfactory. When changing the front shackles it was noted that the spring eyes were both oval and tapered, making it necessary to machine each half of the bushes to a different size. FCP.136 strengthened rear wheel arch support brackets. The strengthening consisted of thicker gauge material. This applied to the front brackets only, the original thin rear brackets being fitted. The strengthened brackets did not collapse but the thin one had gone badly. The mod. should be applied to both front and rear brackets for production. Hydraulic Jacks. (Pressure piping Lot.FG.1474.) The flexible pipe on the nearside rear spring broke, as it had fouled the brake mechanism. A modification to the lie of the pipe has been made. The pipe and union nut on top of the nearside rear jack had fouled the shock damper link. This cannot occur if the jack is mounted so that the unions point straight forwards. | ||