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).
Shock damper failures and modifications.
| Identifier | ExFiles\Box 97\4\ scan0087 | |
| Date | 28th October 1938 | |
| Hoob To Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} from Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} Chateauroux. Rm{William Robotham - Chief Engineer}/ADM.11/MH.{M. Huckerby}28.10.38. 8.B.V. - SHOCK DAMPERS. Front Refill valve failure. We do not think the failure is due to normal loading, as much higher pressures are used on the bump rig. We have discovered that with the kind of leaks you have, the main valve can bind. This would cause the failure. We want to run with all the leak through the refill valve in future The refill valves are therefore drilled differently for the bump and rebound pistons. The valves sent out are like this. Will you please block up the leak hole through the main valve with solder. The leak hole is the transverse hole through the valve, marked in red on the enclosed drawing. The other holes in the valve must be cleared after soldering. As your valve has been sticking then part of the no-pitch ride characteristic has been due to this. we are accordingly allowing less leak in the new valves supplied. We shall have to go over the damper setting situation here to get the best ride with the new leak system. Rear Shock Damper Connecting Links. We are sending some more rubbers and have to-day started testing them on the bump rig. Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} | ||