Rotationally slack dynamo drive on 25/30 and Bentley models, caused by undersized rubber buttons.
| Identifier | ExFiles\Box 162\1\ img078 | |
| Date | 5th May 1936 | |
| BY. {R.W. Bailey - Chief Engineer} c. Sft. {Mr Swift} E {Mr Elliott - Chief Engineer} /JNR. {Charles L. Jenner} 1/HP.5.5.36. re 25/30 and Bentley Dynamo Drive. We notice on the cars on production that the three rubber button drive between the wheelcase and the dynamo are rotationally slack, which we fear might result in rapid deterioration of the rubber buttons. This is caused by the buttons being undersize and a plus 10 limit on the dynamo fan. We also notice that there is a taper on the rubber mould and if this has got to be it would be better if it was reversed so that it would help when entering the buttons into the dynamo fan when erecting. The durometer of the rubber is not quoted on the drawing E.87011. E {Mr Elliott - Chief Engineer} /JNR. {Charles L. Jenner} | ||
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).