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).
Revised design for India front springs, proposed by Mr. Royce to increase their lifespan.
| Identifier | ExFiles\Box 106\1\ scan0056 | |
| Date | 22th October 1925 | |
| X. 5410 To BY.{R.W. Bailey - Chief Engineer} from DA.{Bernard Day - Chassis Design} c. to CJ. Hs.{Lord Ernest Hives - Chair} DA{Bernard Day - Chassis Design}9/M22.10.25. INDIA FRONT SPRINGS. We send herewith N.sch.2074 shewing a revised method of making the front springs with a view to increasing the length of life. It is understood that fractures generally occur immediately under the central sheath. Mr. Royce therefore wishes to increase the metal towards the centre of the spring, and take out a little towards the ends. The drawing illustrates how it is proposed that this should be done, namely, by putting one more plate into all of the existing springs, giving a short overhang between the bottom plate and the spring pad, and then gradually increasing the overhang towards the ends. A 650 lbs. spring is shewn. Would Derby set out the other two on the same lines? Though shewn flat for convenience it is of course intended that the springs shall have the camber in normal position, free deflection, etc.etc. exactly as at present used. DA.{Bernard Day - Chassis Design} | ||