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).
Instructions for the dynamo drive and tachometer gears on the Large Bore 20/25 and Bentley models.
| Identifier | ExFiles\Box 82\4\ scan0222 | |
| Date | 8th January 1936 | |
| V 207 To By.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}6/KW.8.1.36. Large Bore 20/25 & Bentley Dynamo Drive. We understand instructions for the dynamo drive for these engines are for the new drive by 3 rubber blocks and as yet this has not been run and was not fitted to the 10,000 miles Bentley. This car has a drive to L.O.P. E.55904 and this should be instructed for production, having satisfactorily completed the run in France on B-56-BN.{W.O. Bentley / Mr Barrington} Similarly the present standard tachometer gears should be used and a rev. counter calibrated accordingly. The extra speed of the cable gave no trouble on B-56-BN{W.O. Bentley / Mr Barrington} and the new drive has not been tested. These two items may be standardised later after they have been tested. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} | ||