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).
New scheme for the Phantom III independent front suspension rebound buffer.
| Identifier | ExFiles\Box 95\2\ scan0176 | |
| Date | 6th February 1937 | |
| 346 To RY. Copy to Mr. [REDACTED] Rml. CHG. Hives. E/Ev.{Ivan Evernden - coachwork}2/MN.6.2.37. Standard Phantom III Independent Front Suspension Rebound Buffer. It has been almost completely established that no matter how large the rebound rubber may be it will not hold the top triangle levers against the main suspension spring load unless the rubber is encased. Our suggestion, N.Sch.4957, failed to do the job for which it was intended, namely to stop the upper triangle lever in a position where the wheels are free when the car is jacked up. On N.Sch.5030 herewith we show a scheme of rebound rubber in which after a certain amount of compression, the rubber is entirely trapped in a metal cup. As soon as the rubber has spewed out until it fills the cup the rating of the rubber approaches infinity and the arm is stopped more or less suddenly. If the rubber as drawn stops the arm too soon it may be shortened or preferably have a hole bored up its centre to reduce its volume. EV.{Ivan Evernden - coachwork} Att:N.Sch.5030. | ||