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).
Decision to change the Wraith III front suspension main lever housing from a steel casting to a reinforced steel forging after component failure.
| Identifier | ExFiles\Box 9\5\ 05-page200 | |
| Date | 21th April 1938 | |
| MARTINDALE 646 DY{F R Danby}/KG. C. Rm.{William Robotham - Chief Engineer} DA.{Bernard Day - Chassis Design}16/S.21.4.38. WRAITH III - FRONT SUSPENSION. The main lever housing having broken on the bumping rig when produced as a steel casting, it has been decided to return to a steel forging as originally intended. Though the castings which have broken appear obviously defective, it seems wise to reinforce the forging at the point of fracture, and F.CD.629 (print herewith) shews the modification to the existing detail drawing to produce this result. GW.1746/7, though calling for castings are actually designed for forgings, so remaining particulars can be as on those drawings. Modified details urgently required. DA.{Bernard Day - Chassis Design} | ||