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 failure and modification of a Wraith III shock damper lever.
| Identifier | ExFiles\Box 9\8\ 08-page15 | |
| Date | 26th May 1937 | |
| SECRET. LBS How many hours had this run at what load Copy to He. Ha. Rm.{William Robotham - Chief Engineer} H.C. Rm{William Robotham - Chief Engineer}/LES.{Ivan A. Leslie} 642 Rm{William Robotham - Chief Engineer} E/EV.{Ivan Evernden - coachwork}4/N.26.5.37. WRAITH III. SHOCK DAMPER LEVER. With reference to Rm{William Robotham - Chief Engineer}/Les.8/JH.4.5.37, and the failure on the bumper chassis of the rear shock damper and roll rod operating lever, we send herewith Lec.5690 showing a modified lever increased in strength at two sections of failure. Theoretical consideration forced us to the conclusion that this shock damper arm receives considerable bending at the sections in question resulting from the reaction of the roll rod on the damper as well as its own bending due to the damper load itself. We have increased the modulus of section at the two points of fracture by 100% approximately. It is possible to open out the dies of both the roll rod lever and the shock damper lever to make the new pieces. E/EV.{Ivan Evernden - coachwork} Att: Lec.5690. | ||