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).
Recommendation to replace the standard Phantom III top piston rings due to breakage.
| Identifier | ExFiles\Box 94\5\ scan0125 | |
| Date | 27th February 1939 | |
| 336 To By.{R.W. Bailey - Chief Engineer} Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}11/JH.27.2.39. Phantom III Piston Rings. With reference to the breaking of Phantom III top rings. It is recommended that the standard ring EB.1494 should be replaced immediately by EB.2377. The new rings is the standard 3 1/4 lire Bentley ring and is interchangeable. Depots should be notified accordingly. Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} | ||