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).
Note regarding a revolution counter drive design for the Big Bore Bentley.
| Identifier | ExFiles\Box 82\4\ scan0152 | |
| Date | 12th September 1935 | |
| +200 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} E/Lid.{A. J. Lidsey}3/HP.12.9.35. Rev. Counter Drive on the Big Bore - Bentley. In reply to Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}7/KW.12.9.35, we have already issued a design - LeC.4686 for a rev. counter drive to suit the 1½ times engine speed dynamo. This has been arranged so that the instrument now in use can be used with the altered ratio. E/Lid.{A. J. Lidsey} | ||