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).
Calibration figures for the AC type speedometer and rev counter on model 6-B-IV.
| Identifier | ExFiles\Box 165\2\ img108 | |
| Date | 15th July 1937 | |
| To Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} 6011. Rm{William Robotham - Chief Engineer}/Wst.9/JH.15.7.37. AC Instruments on 6-B-IV. We attach herewith calibration figures of the speedometer and rev counter of the AC type fitted to 6-B-IV. Rm{William Robotham - Chief Engineer}/Wst. | ||