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).
Outlining modifications and an investigation concerning front springs on various EAC models.
| Identifier | ExFiles\Box 72\3\ scan0009 | |
| Date | 19th February 1924 | |
| X. 9410 S E C R E T. R2/M19.2.24. To DA.{Bernard Day - Chassis Design} from R.{Sir Henry Royce} c. to CJ. R.{Sir Henry Royce} RG.{Mr Rowledge} c. to Wor.{Arthur Wormald - General Works Manager} HS.{Lord Ernest Hives - Chair} BY.{R.W. Bailey - Chief Engineer} RE. FRONT SPRINGS ON VARIOUS EAC's. X. 9410 I understand all front springs are to be - (1) 45" long - i.e. EAC.2.3.4.& 5. (2) They are all to be 25% stiffer. This increase improves their life considerably together with other improvements in manufacture suggested, including BY's lower brinell by tempering. (3) The initial camber is to be adjusted (reduced) so that the position of axle is normal with these stiffer springs. (4) Rubber buffers are to be increased in thickness to reduce bump and give extra softness when bump occurs. (5) Except in EAC.3. (old cars to be converted) the axle is brought central again as our usual practice. (6) We are still very anxious to have a sufficiently strong and satisfactory bracket for anchoring the spring . We must be careful not to get the car high. I have asked for an investigation as to the cause of breaking of front springs, such as stresses set up by tendency to move endways, when one wheel rises or falls relative to the other, which was found to be the cause of front cross member failure. I have not received blue prints of all the new work done in DA{Bernard Day - Chassis Design}'s department, but I have many from Messrs. RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} and ST.{Capt. P. R. Strong}, and I hope my criticism has been worth the trouble of sending the prints. R.{Sir Henry Royce} | ||