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).
Results of experiments on the Phantom II and J.III models, focusing on silencer power loss and the necessity of the cutout feature.
| Identifier | ExFiles\Box 104\2\ scan0038 | |
| Date | 9th July 1932 | |
| He/Rm.{William Robotham - Chief Engineer}11/A.{Mr Adams} 9.7.32 contd. -4- However, we shall know more when we have completed our present series of experiments on the P.II and J.III. At present it appears that, unless we are content to lose a considerable amount of power in the silencer, we shall still have to retain the cutout on Continental P.II's but with the advantage that we should be able to make the car pleasanter for the occupants under these conditions. He/Rm.{William Robotham - Chief Engineer} Attached. Sheets 1, 2 & 3, Rm.{William Robotham - Chief Engineer}71, Rm.{William Robotham - Chief Engineer}72, Rm.{William Robotham - Chief Engineer}73. | ||