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).
Request to remove a No.2 Gearbox and fit a No. 1.B.5 gearbox, noting the latter has lapped gears.
| Identifier | ExFiles\Box 98\4\ scan0055 | |
| Date | 9th January 1939 | |
| Hood. To HPT. Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies}14/JH.9.1.39. 9.B.5. Will you please have No.2 Gearbox removed and No. 1.B.5. fitted the latter has lapped gears. Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} | ||