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).
Manufacturing and performance issues of front springs for the Phantom and 20HP models.
| Identifier | WestWitteringFiles\I\September1922\ Scan32 | |
| Date | 23th September 1925 | |
| [Typed Text] TO HS.{Lord Ernest Hives - Chair} FROM DA.{Bernard Day - Chassis Design} Copy to CJ. DA{Bernard Day - Chassis Design}4/M23.9.25. FRONT SPRINGS. X3803 X8410 X3900 X5410 Referring to the front springs for both the Phantom and the 20HP., and to the possibility of improving their life, either the present springs are badly made - that is to say - the heat treatment is wrong, or the surface of the plates is wrong, or else the springs should be made with thinner plates, resulting in heavier springs and less stress. In connection with this we may say that we have continuously dropped the stress recently, and though there has been an improvement, it is not as much as one would expect from the amount of drop. The American springs have slightly less steel in them (in proportion to the work done) than the front springs we are now using. It is suggested therefore that the question of the manufacture of the springs should be gone into further. Could we compare our springs with an equivalent set of Lemoine springs? (i.e. as regards weight of steel, number and thickness of plates, etc.) [Handwritten Text] CJ comments Hs{Lord Ernest Hives - Chair} Obviously this sh'd be done without delay in bumping people. DA.{Bernard Day - Chassis Design} Our Paris have some Lemoine springs. Ask them by telegram to send you what you want. [Stamped Text] ORIGINAL MISC RECEIVED 25 SEP 1925 | ||