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).
Speedometer error testing results for vehicle 4-B-50.
| Identifier | ExFiles\Box 111\4\ scan0190 | |
| Date | 16th March 1940 | |
| 800a. To Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} SPEEDOMETER. Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies}1/SW.16.3.40. 4 - B - 50. M.P.H. Time. % Error. 30 122 secs 1.66 Fast 40 94 " 4.44 " 60 64 " 6.66 " 70 55 " 7.0 " 80 49 " 8.85 " Taken 1-3-40. [Signature: Rm{William Robotham - Chief Engineer}] Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} | ||