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).
Revised rebound buffer design for the Phantom III front suspension.
| Identifier | ExFiles\Box 95\2\ scan0142 | |
| Date | 30th November 1936 | |
| To Rm.{William Robotham - Chief Engineer} Copy to E.{Mr Elliott - Chief Engineer} De. (crossed out) BY.{R.W. Bailey - Chief Engineer} (crossed out) Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} (crossed out) 346 E/Ev.{Ivan Evernden - coachwork}4/MN.30.11.36. Revised Rebound Buffer on Front Suspension Phantom III - N.Sch.4957. We were under the impression from what we have been told by yourselves that you did not like solutioning the rubber buffer into a metal cup and that a much better job was afforded by vulcanizing the rubber on to a thin metal plate, therefore, we have used this construction on our N.Sch.4957. We have no objection to continuing to use the former method for our immediate needs, as from your Rm{William Robotham - Chief Engineer}/Les.1/HJ.30.11.36 it would appear to facilitate getting the revised rebound buffer scheme on test and on production. We have asked the Production D.O. to issue immediately the details for a scheme similar to N.Sch.4957 but with the rubber held in a cup. These details are already drawn and can be issued forthwith. The durometer hardness of the rubber will have to be determined experimentally in order that the arm may stop in the position drawn when the car is jacked up. This rubber will not be so hard as that which would be required on our N.Sch.4957, as less of the rubber buffer is working effectively. We would be glad if the Production D.O. would also issue to you details of our scheme as originally drawn, and we would be glad if you would follow up with tests on this scheme as we are anxious to obtain data concerning rubber buffers vulcanised to a sheet metal plate, not only because you say that the best adhesion between metal and rubber is so obtained, but because we have used this construction on the Wraith II type levers for Phantom III as well as for the rubber buffers on Wraith II itself and Bentley III. | ||