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).
The use of diamond mounting on car bodies not built on sub-frames and the potential loss of frame stiffness.
| Identifier | ExFiles\Box 14\5\ Scan250 | |
| Date | 16th November 1931 | |
| X7005. X7005. X5005 X7380. X5380. S/W To Hs.{Lord Ernest Hives - Chair} from Sg.{Arthur F. Sidgreaves - MD} re Diamond Mounting. Sg{Arthur F. Sidgreaves - MD}12/E16.11.31 Referring to the above and the question of not using sub frames on 40/50's, would you please let me know what experience, if any, we have of the use of cars with diamond mounting with bodies not built on sub frames. I am asking Cx.{Major Len W. Cox - Advertising Manager} to put a few through but I am wondering if we have any experience at present. I rather think we have not. In regard to 20/25's, I should like some information. I appreciate that 19-G-4 was a combination of this description but the body being of the Weyman type means that we have not the experience with the ordinary coach-built type of body. Apparently we shall not get the experience with 18-G-4 as I understand this body is built on a sub frame. It looks as if we shall have to go steady about this so as to avoid running ourselves into trouble as I gather W.W. are rather concerned about the loss of stiffness of the frame which takes place with diamond mounting. Sg.{Arthur F. Sidgreaves - MD} | ||