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).
Query comparing cylinder bore wear figures between the 4¼ litre and 3½ litre Bentley engines.
| Identifier | ExFiles\Box 131\2\ scan0270 | |
| Date | 10th October 1938 | |
| W/K - GWH.{George W. Hancock - Head Chateauroux} 1113 Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}9/JH.10.10.38. CYLINDER BORE FIGURES. Further to our conversation of October 7th. We wish to ascertain how cylinder bore wear figures of the 4¼ Bentley compare with the 3½ litre Bentley in relation to the following. (1) Is the maximum wear figure for a given mileage, worse on the 4¼ litre? (2) Is the position of maximum wear in the bore the same on both engines. We believe that measurements are taken at three points in the bore, and would be obliged therefore if you could supply average figures of the three positions for a given mileage on both chassis. Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} | ||