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).
Failures on a Wraith Bumper Chassis after 50 hours of testing on drums.
| Identifier | ExFiles\Box 119\1\ scan0004 | |
| Date | 3rd April 1937 | |
| E.{Mr Elliott - Chief Engineer} from Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} c. Hs.{Lord Ernest Hives - Chair} c. Da.{Bernard Day - Chassis Design} c. E/Hdy.{William Hardy} c. E/Iv. c. By.{R.W. Bailey - Chief Engineer} 1024 Rm{William Robotham - Chief Engineer}/Les.1/AP.3.4.37 WRAITH BUMPER CHASSIS The above chassis has run for 50 hours each end using 3" high cams on the drums. The following failures have occured:- Front End on Drums. 1. Engine mounting frame brackets FW.370/1 - 17 1/2 hours. 2. Near side engine mounting rubber casing FW.179 - 17 1/2 hours. 3. Spare wheel carrier brackets DW.128 - 24 hours. 4. Radiator plate LW.644 and bracket EW.530 - 51 1/2 hours. 5. Front suspension spring GW.432 - 51 1/2 hours. Failure due to electric etching. 6. Top triangular levers. These show slight cracks during magnetic testing. 7. Last bolt securing dash bracket FW.613 to frame. - 17 1/2 hours and 8 1/2 hours. 8. Bolt securing O.S. bumper bar extension FW.468 to spring pot. - 14 hours. Rear End on Drums. 9. Petrol tank. The baffles FW.535 collapsed and the O.S. strap Fw.529 broke. - 8 1/2 hours. 10. Shock damper connecting tubes Rubbers FW.600. 2 sets were worn out after 22 1/2 hours and 27 hours. 11. Rubber spring bushes. After 50 hours the condition of the rubbers were poor. 12. N.S. rear spring-17 hours. continued | ||