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).
Proposal for a revised method of manufacturing 'India Front Springs' to increase their lifespan by adding an extra plate.
| Identifier | WestWitteringFiles\N\October1925-December1925\ Scan47 | |
| Date | 22th October 1925 | |
| TO [text struck through] FROM DA.{Bernard Day - Chassis Design} C. to [text struck through] HS.{Lord Ernest Hives - Chair} ORIGINAL DA{Bernard Day - Chassis Design}9/M22.10.25. INDIA FRONT SPRINGS. X5440 We send herewith N. scheme 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} [Stamp: RECEIVED 28 OCT 1925] | ||