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).
Modified rebound buffer design, the use of existing forgings, and the need for urgent testing.
| Identifier | ExFiles\Box 92\4\ scan0265 | |
| Date | 4th December 1936 guessed | |
| -2- appear to take .080 off the movement of the end of the bell crank lever on the yoke piece. We understand that shortly the revised bell crank lever giving extra travel will go on production and then this objection loses much of its importance. We send herewith N.Sch.4957 showing a modified rebound buffer stopping the top triangle in the position previously stipulated. The forging is an existing one with the face of the bore machined. It will be possible to replace the existing buffers on cars already delivered and to use up the forgings collected during replacement. In order to save the mould for the rubber buffer we have maintained the present shape but have vulcanised the rubber to a thin plate which design, we understand, the makers recommend. It will be necessary to discover by experiment a rubber with durometer hardness which when compressed will close up to the right length. In order that it may be possible for the Test Dept. to be able to set all cars so that the stopped position of the top triangle lever is to the required dimension no matter what rating and loading of front springs may be used, the rubber has been made readily detachable from the forging spanning the top triangle, and adjustable packings are provided. As this matter is very urgent we should be glad if you would arrange to fit up a car according to this scheme as soon as possible and give us a report. E/EV.{Ivan Evernden - coachwork} Att:N.Sch.4957. | ||