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).
Cause of a Smith dynamo breakdown due to interchanged fuses and a proposed new wiring system.
| Identifier | ExFiles\Box 61\2\ scan0374 | |
| Date | 27th August 1920 | |
| R.R. 199 (250T) (SD676 19-7-17) MP 180865 X.2515 To EFC. from Da.{Bernard Day - Chassis Design} Da{Bernard Day - Chassis Design}3/CB27.8.20. X.295. X.25151. Mr. Royce agreed that the cause of the break-down of the Smith dynamo was the interchanging of the main and field fuses, the former blowing and so allowing a high voltage to be generated in the dynamo. In the new wiring System, which is being brought out there is no fuse in the main dynamo circuit, so that it will be impossible for the dynamo to become disconnected from the battery. I am not sure whether the standard wiring arrangement has not recently been changed so as to include the fuse in the dynamo main circuit. If this is so, and the matter is not yet too far advanced, I think it would be desirable to stop it. Da.{Bernard Day - Chassis Design} | ||