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).
Modified servo drive, highlighting the need to monitor the central retaining screw during testing.
| Identifier | ExFiles\Box 112\1\ scan0139 | |
| Date | 29th November 1938 | |
| Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} c. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} 841 DA.{Bernard Day - Chassis Design}1/G.29.11.38. B.50. SERVO. PD.222 MODIFIED DRIVE. We understood one of these units is about to be tested. We think the central retaining screw should be watched. By calculation it should be up to its job if properly tightened up, and it is essential that this should be done. DA.{Bernard Day - Chassis Design} | ||