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 report for Maconites chassis high-tension ignition cable.
| Identifier | ExFiles\Box 168\1\ img086 | |
| Date | 14th March 1930 | |
| X3860 EFC. 14.3.30. X.3860. MACONITE CHASSIS H.T. IGNITION CABLE. X.4473. Six samples of the above submitted for test from production have successfully withstood 19,300 volts R.M.S. for 30 mins. after previous immersion in water for 24 hours at atmospheric temperature. EFC/HEW. | ||