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).
Design of a tachometer drive for bi-directional camshafts, proposing separate schemes for gear and chain drives.
| Identifier | ExFiles\Box 124\2\ scan0184 | |
| Date | 28th May 1940 | |
| 1044 To Jnr.{Charles L. Jenner} from Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} c. to Les.{Ivan A. Leslie} Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer}2/JMc.28.5.40. Tachometer Drive. Speedometer Drive. Tecalemit Pump Drive. Re. your memo Jnr.{Charles L. Jenner}3/JH.24.5.40. We believe that your difficulty is due to your desire to make a tachometer drive suitable for use with camshafts running in both directions of rotation because we do not yet know whether we are going to use gear or chain drives. If this is so, we suggest that you make a scheme suitable for gear drive only and if we adopt chain drive, we will have to adopt a new scheme. Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} | ||