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 specifications for building a Wraith III Bump Chassis.
| Identifier | ExFiles\Box 119\1\ scan0132 | |
| Date | 22th August 1938 | |
| 1024 To HPS.{Horace Percy Smith - Experimental Factory Mgr} Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale}8/JH.22.8.38. WRAITH III BUMP. CHASSIS. Will you please build up this chassis to the following specification :- FRONT. (1) Forged steel front suspension spring housings with 4 bolt fixings, FCD.625 and 629 and 679. (2) Front springs GW.1981/2. (3) Front roll rod FCD.306. (4) Flexible piping FCD.637. This will have to be roughly fixed in the approx. position. (5) (REAR) Front damper valves EXS.827/8/9. (6) Threaded front anchorage rear spring FCD.645. (7) Simplified rear damper fixing FCD.759. (8) Rear springs FW.1675 (On order). (9) Threaded shackles FCD.73 and 286. (10) New rear axle centre case filled with 180 lbs. lead. (11) New 3½% nickel steel tubes. This memo. supercedes Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer}4/MH.{M. Huckerby}30.6.38. Most of this material has been instructed for some time: we should like to know what the position is. Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} | ||