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 results of canvas and fibre core material specimens.
| Identifier | ExFiles\Box 39\3\ Scan216 | |
| Date | 30th January 1923 | |
| Contd. -4- EFC2/T30.1.23. Nos. 5 & 6 were canvas impregnated specimens. The result on No.5 is low owing to previously existing cracks in the material. Specimen No.7 was made up with a fibre core and the low breakdown voltage might be accounted for by the different dielectric inductivities of the two materials causing a much larger proportion of the voltage to be thrown on one of them. The various specimens referred to are sent to R.{Sir Henry Royce} for his examination. EFC. | ||