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).
Character of work and increased costs associated with manufacturing springs for the Terraplane model.
| Identifier | ExFiles\Box 154\1\ scan0100 | |
| Date | 31th January 1934 | |
| Sg.{Arthur F. Sidgreaves - MD} [crossed out] c. Hsr. [crossed out] c. Hs.{Lord Ernest Hives - Chair} BY.1/G.31.1.34. X3873 TERRAPLANE - RE: CHARACTER OF WORK IN THE SPRINGS. ---------------------------------------------------- Sg.{Arthur F. Sidgreaves - MD}20/E.30.1.34. With reference to the question of springing and the specific methods which we have adopted for Rolls-Royce type of spring, the increased cost was incurred under two headings :- (a). Increased durability. (b). Regularity of results to maintain ease of riding. Heading (a). Under this heading the work done in grinding the plates initially is included, its object being to remove :- (1). The de-carburised surface. (2). Pits and scale due to forging. (3). Surface defects, such as partial laps from rolling. In addition to the foregoing, the cadmium plating is again simply a question of maintaining the life of the spring, and has nothing to do with ease of riding. Heading (b). The extra cost under this heading is mainly concerned with the production of the lubricating holes or ducts, as whilst smooth surfaces are required these have been produced in eliminating the various faults tabulated under heading (a), which militate against long life. We shall examine the springs are you suggest when a car becomes available. Personally, I am definitely of the opinion that we are not doing anything in regard to springs which is not being done on other units in the car in order to obtain a Rolls-Royce product, nor do I consider that the cost of the springs is out | ||