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).
The order of a Harding Tachometer for a Bentley single cylinder unit.
| Identifier | ExFiles\Box 143\1\ scan0156 | |
| Date | 13th March 1936 | |
| X1209 To EJJ/JV. From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}1/MJ.13.3.36. BENTLEY SINGLE CYLINDER UNIT. Will you please order one Harding Tachometer, attachments and drive to suit the DPX.1 Heenan & Froude water brake to be fitted to the above unit. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||