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).
Experimental results from testing various combinations of features for tungsten ignition contact points.
| Identifier | WestWitteringFiles\R\2December1927-February1928\ Scan104 | |
| Date | 14th January 1928 | |
| To R.{Sir Henry Royce} from EFC. c. BJ. E.{Mr Elliott - Chief Engineer} c. Ev.{Ivan Evernden - coachwork} Wor.{Arthur Wormald - General Works Manager} ORIGINAL EFC1/T14.1.28. TUNGSTEN IGNITION CONTACT POINTS. X2894 X8692 In our EFC6/T29.11.27 we put down four experimental features,(see slip) which we were trying on our ignition equipment, the combination of which four was as nearly like the Delco-Remy as we knew. We remarked that an experiment had been made with all these four together and had given such a good result, that experiments would be made by dropping them out first one at a time, then two at a time. This scheme is now completed, the combinations actually tested being:- 1+2+3+4. Reported very good in EFC6/T29.11.27. 1+2+4. This is now reported as being quite a good result. The screw point from this test is sent to you, labelled 38. 1+2. Reported as being good, in the 1st. para. of EFC5/T12.12.27. 2+4. As reported in the 2nd. para. of EFC4/T23.12.27 this was unfortunately spoilt by the contact lever having worked loose. It had been observed previous to being spoilt that it was going very well. Of (1), (2) (3) and (4) taken separately, it will be remembered that only (2) of itself was of any value. For this reason the combinations tested have included (2) every time. Further, for the reason that the off-set lever is noisy and had not shown any advantage at all, taken separately, (3) was omitted from the combinations on test except-ing the first one in which all four were together. That left only the combinations of 1+2+4, 1+2, 2+4, to be tried, as now completely reported. Contd. | ||