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).
Difficulty of machining a supplied piece of tungsten due to its hardness and cracks.
| Identifier | ExFiles\Box 35\5\ scan 064 | |
| Date | 21th October 1919 | |
| To EFC. from RHC.{R. H. Coverley - Production Engineer} X.2894. RHC{R. H. Coverley - Production Engineer}9/LG21.10.19. X 1818 X.2894 RE TUNGSTEN. With reference to the piece of tungsten you supplied, we find that this is much too hard to work on the machine; it may be possible to Grind it but there are so many cracks in it that we do not recommend even this as we may have faulty contacts but I have got Mr. Hall interested in treating this to enable us to work it on the machine; when this has been carried out we will let you know. RHC.{R. H. Coverley - Production Engineer} | ||