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 adjustment of Gordon Armstrong rear dampers to prevent pitching.
| Identifier | ExFiles\Box 82\5\ scan0046 | |
| Date | 17th March 1937 | |
| Rm{William Robotham - Chief Engineer}/GWH{George W. Hancock - Head Chateauroux}/IMW.{Ivan M. Waller - Head of Chateauroux} from Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} c. to Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} 200a Rm{William Robotham - Chief Engineer}/Les6/R.17.3.37. GORDON ARMSTRONG REAR DAMPERS - 3 B.IV. Re. Rm{William Robotham - Chief Engineer}/GWH{George W. Hancock - Head Chateauroux}/IMW{Ivan M. Waller - Head of Chateauroux}/6/JAB.12.3.37. It is not suprising that you require more load to prevent pitching although we had considerable criticism from harshness on this car before it left England. The damper loads are set at 80 lbs and I suggest you should increase these to 120 lbs and, if necessary, up to 150 lbs. The attached leaflet will show you the rough construction of the damper. In order to increase the load of the damper the nut "U" is slackened and the set screw "S" screwed further into the casting. This one adjustment alters the load on both valves. Actually both valves are spring loaded and not as shown in the picture. We have not got the improved dampers ready yet, but if at any time a failure occurs on the dampers you are running we can quickly send you out a similar replacement damper. Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} | ||