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).
Test procedures for ignition cables, including voltage, heat, and chassis endurance tests.
| Identifier | ExFiles\Box 52\1\ Scan091 | |
| Date | 24th October 1928 guessed | |
| -2- Contd. to judgement as to the rapidity with which the cracking effect is produced. (7) A sample length of cable should be bent into a loop about 1 1/2" internal diameter, and the loop made to rest upon or touch a hot metal body (at 100°C) at earth potential. A voltage of 10,000 R.M.S. should then be impressed between the conductor and the hot metal body for 30 mins. If this does not produce failure the voltage should be raised and the time extended accordingly. C. Chassis and subsequent tests. (8) A half set of ignition wires made up with the cable should then be run sandwiched with a standard set on both the magneto and battery ignition (where both exist) on an experimental chassis, for a distance of 10,000 miles at least. An examination should then be made of the dielectric condition. (9) Repeat electrical test No.4, as detailed above. EFC. {E. Fowler Clarke - Electrical Engineer} | ||