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).
Specifications for road springs and buffer clearances on Left Hand Drive Phantom II cars for the American market.
| Identifier | ExFiles\Box 43\2\ Scan270 | |
| Date | 23th January 1931 | |
| To. By.{R.W. Bailey - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey} C. to EP.{G. Eric Platford - Chief Quality Engineer} 85900. Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey}5/KT.23.1.31. ROAD SPRINGS FOR L.H. P.II CARS. Left hand P.II cars for America, fitted with 4.50" initial camber front springs and 10.25" initial camber rear springs should have the following buffer clearances in order to take full advantage of the improvements given by lower rating suspension. It will be appreciated that fitting lower rating springs unavoidably necessitates raising the car slightly. Front buffer clearances under normal load (average number of passengers and 50 lbs luggage) should be 2.0". Rear buffer clearances under normal load = 4.25". (These figures give a spring deflection for load of 4.25" front and 9.65" rear.) Owing to the fact that these springs have a greater deflection than standard for a similar load, it is important that the above figures be rigidly adhered to, otherwise complaint of excessive hitting of the buffers may arise; this applies more particularly to the rear where a limit of 4.25" ± .25" should be fixed. Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey} | ||