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).
General specification of tests on a chassis H.T. ignition cable.
| Identifier | ExFiles\Box 52\1\ Scan137 | |
| Date | 16th January 1930 | |
| X4473 16.1.30. GENERAL SPECIFICATION OF TESTS ON CHASSIS H.T. IGNITION CABLE. A. {Mr Adams} Physical & Chemical Tests of the Dielectric. (1) Immerse in petrol for 100 hours. Note effect and increase in weight, if any. (2) Immerse in engine oil for 100 hours. Again note effect and increase in weight, if any. (3) Temperature tests :- (a) Maintain the cable at a temperature of 150°C. for 4 hours and observe the effect on the dielectric. (b) Subject a length of the cable to dull red radiant heat from a source such as an open 1 k.w. radiator element placed at a distance of 4 inches from the cable, for 100 hours Again observe the effect on the dielectric. (c) Also observe the degree of inflamability by exposing a portion of dielectric to a naked flame. B. Electrical Tests. (4) Perform a high A.C. voltage breakdown test after 24 hours immersion of the central portion of a length of cable in water at normal atmospheric temperature, the test being conducted whilst the cable is still immersed. (5) A sample length of cable should be kept at 150°C. for one hour and allowed to cool, after which it should be bent into a loop of 1" internal diameter and | ||