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).
Summary of common vehicle complaints and the proposed engineering solutions.
| Identifier | ExFiles\Box 47\2\ Scan183 | |
| Date | 30th September 1929 guessed | |
| -3- | Nature of Complaint | No. of Cars | Last Qtr's. Total | Remarks | | :--- | :--- | :--- | :--- | | Engine Overoiling. | W. 5. N. 9. P. 1. ___ 15. | 20. | Honing cylinder bores and fitting new pistons, also strutting outer walls, usually overcomes this. Improved design of cylinder now on production. Further experience is proving that strutting is giving the best results. We are also trying a new type of piston ring which it is hoped will prevent overoiling taking place at a small mileage. | | Engine Slipper Drive Seized. | W. 3. N. 12. P. - ___ 15. | 26. | In spite of carrying out all the latest improvements, i.e. cotton duck friction washers and new spring poundage, we are still getting slipper drives which increase in loading and become uneven in action with running. Further experiments are being carried out. | | Exhaust Blows. | W. 7. N. 27. P. 5. ___ 39. | 41. | The difference in expansion between the aluminium cylinder head and the exhaust pipes is so great that the washers do not cover the joints and are burnt away. We are now fitting a modified washer. | | Hydraulic Shock Absorbers. | W. 7. N. 25. P. 2. ___ 34. | 26. | Depot Sheet No. Hm.{Capt. W. Hallam - Head Repairs}105 has been issued, showing the drilled valve in connection with the 20 HP. Chassis. This is also applicable to the 40/50 HP. Further instructions will be issued shortly in connection with springing complaints, where a further alteration will be recommended in connection with the Hydraulic Shock Absorbers. | | ||