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).
Request for an opinion on American steel recommendations for various chassis components.
| Identifier | ExFiles\Box 142\2\ scan0480 | |
| Date | 2nd April 1940 | |
| 1200 Rm{William Robotham - Chief Engineer}/HH/Jenkinson. Rm.{William Robotham - Chief Engineer}6/ML.2.4.40. MATERIALS. We have some recommendations from America with regard to materials used for various components of the chassis. We should like to have your opinion as to how the physical qualities of these materials compare with those at the moment specified for the same Rolls Royce pieces. CONNECTING RODS. American steel 1040 or 1335 (30-40 carbon, 1.6 - 1.9 manganese). AXLE-SHAFTS. 1330A and 4130. CRANKSHAFTS. 1045 or 1050. In the case of crankshafts we shouldlike to know how these two American steels compare with the straight carbon steel in which we have recently instructed several crankshafts. We expect to be able to supply you with full particulars of all the materials used both on production and experimentally on Rolls Royce chassis. Rm.{William Robotham - Chief Engineer} | ||