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).
Standardizing chassis dynamos and starter motors for the 20/25 HP and Bentley models.
| Identifier | ExFiles\Box 168a\3\ img180 | |
| Date | 27th March 1935 | |
| To K.{Mr Kilner} from HS{Lord Ernest Hives - Chair}/Ra. c. to SG.{Arthur F. Sidgreaves - MD} c. to Mor. c. to By.{R.W. Bailey - Chief Engineer} c. to Hy{Tom Haldenby - Plant Engineer}/RD. (63) HS{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}2/KW.27.3.35. 20/25 HP. Chassis Dynamos. Cg.30/E.25.3.35. Now that this dynamo will be fitted to 21-G-IV for 10,000 miles test, with the low gear ratio, there is no doubt that the average speed at which it runs will be the same as if it was run on the Bentley. Therefore if it passes the test successfully it should be possible to standardise it on the Bentley. In addition, on 21-G-IV we are going to fit the geared starter motor, which means utilising the Bentley clutch pit. This means that at the conclusion of 21-G-IV's run, unless a failure occurs, both the 20/25 and the Bentley can have geared starter motors and smaller air cooled dynamos running at 1x times engine speed, so that the crankcases and clutch pits of the two cars become identical. With a view to thus simplifying production we shall be glad if you will give this project design consideration, because the Bentley clutch pit on the 20/25 slightly moves the position of the brake equaliser shaft. HS{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||