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).
Examination report on the condition of various ignition cable sets after extensive mileage.
| Identifier | WestWitteringFiles\S\March1928-May1928\ Scan157 | |
| Date | 2nd May 1928 | |
| EFC1/T2.5.28. -4- Contd. (1) A complete set of Glover H.T. cable used on battery ignition on 8-EX, having run approximately 15,000 miles. (2) A sandwich set of Maconite and Glover H.T. cable, used on chassis 11-G3, having run 12,000 miles. (3) A complete set of Maconite cable (battery and Magneto ignition) off 12-EX, having run approximately 23,000 miles. (4) A complete set of Maconite cable (battery and magneto ignition) off 10-G11, having run approximately 21,000 miles. (5) Complete set of sandwich Glover and Maconite H.T. wires from 7-EX which have run in all 16,000 miles. Careful examination of the wires resulted in the following observations :- The condition of (1) was very poor. The wires were stiff and they cracked when bent slightly. The condition of both samples in case (2) was good, but the Glover samples were less flexible than the Maconite. In case (3), the condition was noted to be good with a slight deterioration noticeable at the ends adjacent to the sparking plugs. In case (4), the condition was noted to be good. There was no cracking and the flexibility was good. Three wires were noted to be slightly swollen at the ends adjacent to the sparking plugs. In case (5) the condition of the Glover wires was fairly good, but these were rather stiff at the ends adjacent to the sparking plugs. The condition of the Maconite wires was uniformly good. Contd. | ||