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).
Machining tests and material sources for bone grey fibre rubbing blocks for battery ignition.
| Identifier | ExFiles\Box 69\1\ scan0346 | |
| Date | 13th August 1924 | |
| X. 4646 To RHC.{R. H. Coverley - Production Engineer} from EFC. EFC5/T13.8.24. X.4357 - BONE GREY FIBRE RUBBING BLOCKS FOR BATTERY IGNITION. The rubbing blocks which we have at present on test were made from the first sample of bone grey fibre handed to you under cover of our EFC6/T19.5.24; machining tests of this first sample were carried out and reported by you in your RHC{R. H. Coverley - Production Engineer}7/LS2.6.24. You have also carried out machining tests on the second sample and reported these in your RHC{R. H. Coverley - Production Engineer}1/LS24.7.24, on which note you erroneously gave the reference of our instruction (which was only verbal) as EFC6/T19.5.24, as above. What we are particularly interested to know is whether it is considered that the machining properties of the second sample are in any way different from those of the first, your having reported both of them as machining well. We do not know at the moment the exact source of the first sample, but the second has come from our own people in U.S.A. Further, we have to-day received from BY.{R.W. Bailey - Chief Engineer} rubbing blocks made of identical material with the second sample, and these are now handed to you for the purpose of fitting to levers for test of the second sample material. We are re-handing you the lever taken from 9-PK (the only one we have available), to which one of these blocks should be fitted for our own rubbing test on our rig. Would you please at the same time have new platinum points fitted. As regards the other two, I should be glad if you would obtain two new levers to which to fit these, after which kindly return to us for the purpose of taking dimensions and we will issue instructions as regards placing these on cars. EFC. | ||