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).
Report listing various engine types and discussing the sourcing and analysis of ignition points.
| Identifier | ExFiles\Box 37\1\ scan 060 | |
| Date | 14th January 1919 | |
| R.R. 25a (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. -3- EPC3/T14.1.19. Contd. (1) Lorraine Dietrich 12 cylinder (2 rows of 6 cylinders) also 12 " (3 rows of 4 cylinders). (2) Panhard Levassour 16 cylinder (4 rows of 4 cylinders) (3) Otis Pifre 12 cylinder 60°V.{VIENNA} designed by Hispano. (4) Hall-Scott Aviation Motor 4 cylinder, in line. 6 cylinder, in line. They stated also that they had prepared apparatus for the "Gnome" radial 20 cylinder engine, 5 cylinders radially x 4 side by side, and that they were preparing apparatus for the Hispano Suiza. It will be seen from this what a variety of ignitions they have made and are willing to make. Regarding the question of Tungsten points, they promised us a selection of these, suitable for fixing on our chassis and aero ignitions. Mr. Kennington stated that it was no use getting Tungsten from anywhere and expecting it to be right, but that you must get the right thing, and this can only be obtained in this country from the B.T.H. who represent the General Electric Company of America. In this connection we might state that we had some points removed from some Remy contact breakers and asked Mr. Hall to analise them. He gave, as the approximate analysis of these Remy points, 75% gold and 25% platinum. He stated that the tests were difficult owing to the small quantity of alloy available. Other remarks contained in his report were as follows:- "These points were not attacked by acids, and submitted to treatment only after being attacked by aluminium. They appear to be a platinum gold alloy with traces of the rarer metals as impurities". Contd. | ||