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).
Comparative cost analysis for different types of springs.
| Identifier | ExFiles\Box 158\4\ scan0208 | |
| Date | 31th January 1938 | |
| -2- Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}16/JH.31.1.38. Comparative cost figures are :- (1) Std. S/CV spring EB.175............ £- 14s. 0d. (2) EB.3256 springs in Swedish wire produced by T.S. Co. ............ £- 6s. 6d. (3) Estimated cost of producing EB.3256 springs at R.R. ............ £- 7. 0d. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||