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).
Modifications to the Wraith's front and rear suspension and damper control piping.
| Identifier | ExFiles\Box 9\8\ 08-page13 | |
| Date | 6th May 1931 | |
| To E.{Mr Elliott - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} c. to By.{R.W. Bailey - Chief Engineer} 642 also 646 Rm{William Robotham - Chief Engineer}/Les.I/JH.6.5.31. WRAITH. Front Suspension Rebound Buffers. We find that the shock damper piston hits the end of the cylinder on full rebound. This causes a loud knock on humped back bridges. We have lowered the rebound buffer .425" by making the plate GW.798 flat, which has overcome the knocking. Will you please therefore arrange for the drawing to be modified. Damper Control piping. The position for the blank plug on the near side pipe junction piece, which is used for temporary attachment of a pressure gauge, is very inaccessible. At the moment it is necessary to remove the complete junction piece in order to attach the gauge pipe. Will you please find a more convenient position for the blank plug. Rear Damper Suspension. It is very difficult to remove the rear dampers. This is chiefly due to certain pipes lines passing over the extended arm of the damper side plate. It would be easiest if the side plates could be left on the chassis. This would mean that .437 diameter bolts would be needed between the damper and its side plates. Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} | ||