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).
The testing of new chrome vanadium steel springs for the Wraith side steering tube.
| Identifier | ExFiles\Box 9\7\ 07-page169 | |
| Date | 13th May 1938 | |
| 650. Rm{William Robotham - Chief Engineer}/Mr.Hardy. BY.8/G.13.5.38. Handwritten: Why should we not use swedish wire springs Handwritten: Rm{William Robotham - Chief Engineer} WRAITH SIDE STEERING TUBE SPRINGS. FW.1570. The Order Office have obtained from Messrs. J.B. Skinner & Co. Ltd. of Sheffield, half a dozen of the above springs, which have been produced in chrome vanadium steel. The actual Brinell of the springs supplied is 488/492. This figure would be too high for a valve spring, but I should consider it a workable proposition for the side steering tube. I am handing you four of these springs, so that you may have these tried out under the maximum compressive load to which they will be submitted. They should be held under the load for at least a week, and then tested again for permanent set. This means, of course, each spring should be accurately measured for length before testing and after. The object of trying out the springs is that they can be bought at a much lower figure than the special high carbon steel springs which we buy from Messrs. Salters. This particular spring is being held up at the moment, but the test I am calling for will settle the issue for the new type as well as the present. BY.{R.W. Bailey - Chief Engineer} Handwritten: BY | ||