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 alteration needed for the rev counter drive on the Big Bore Bentley due to a newly fitted dynamo.
| Identifier | ExFiles\Box 82\4\ scan0151 | |
| Date | 12th September 1935 | |
| X200 To E.{Mr Elliott - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}7/KW.12.9.35. Rev. Counter Drive on the Big Bore Bentley. Now that the big bore Bentley is fitted with a dynamo running at 1 1/4 times the engine speed, an altered rev. counter drive ratio will be required if the same instrument is to be used as at present. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||