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).
Requesting a modification to the 'D' series Instruction Book regarding engine sump drainage intervals.
| Identifier | ExFiles\Box 139\3\ scan0164 | |
| Date | 27th May 1938 | |
| 116H To NW.{N. Walker - Patents} from Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}3/MH.{M. Huckerby}27.5.38. P.III 'D' SERIES. If it is not too late to add a further modification to the 'D' series Instruction Book will you please say that the engine sump must be drained every 5,000 miles instead of every 10,000 miles, as we have come to the conclusion that the latter mileage is too long. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} | ||