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).
Difficulty in cleaning the Phantom III main filter and the requirement for a special tool or locking device.
| Identifier | ExFiles\Box 130\2\ scan0303 | |
| Date | 23th November 1936 | |
| To Rm.{William Robotham - Chief Engineer} Cricklewood, Nov. 23rd. 1936. Phantom III. With regard to cleaning the main filter. It is a difficult job owing to the union in the filter turning when undoing the main unit pipe. A special spanner is needed to hold the union as there is no locking device fitted. A locking device is needed as we do not want to have to carry a special tool. Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} | ||