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).
Requesting a further test on a Commutator Breaker Earthing Brush to see if an all-metal version can eliminate sparking.
| Identifier | ExFiles\Box 163\7\ img325 | |
| Date | 28th April 1939 | |
| 6013 To Rm{William Robotham - Chief Engineer}/RC.{R. Childs} BY/RD.1/B.28.4.39. In connection with the Commutator Breaker D.CD.986, would you please give this a further test, in which the Earthing Brush DW.867 is made of Phosphor Bronze. During the test it can be lightly lubricated, the purpose of this being to determine whether an all metal brush will completely quench the sparking. If this is successful, design work will be done to enable the metal brush to be used. BY/RD. | ||