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 for L.P.S. Insulating Paper Grade 745/S, which was found to be of inferior quality and not recommended for production.
| Identifier | ExFiles\Box 61\1\ scan0213 | |
| Date | 7th October 1932 | |
| XG110 BY.{R.W. Bailey - Chief Engineer} c. BY/RD. c. ROY{Sir Henry Royce}/Ms. Hs{Lord Ernest Hives - Chair}/Wst.15/KT. 7.10.32. L.P.S. INSULATING PAPER GRADE 745/S. We have tested this paper and find it to be of very inferior insulating quality. The breakdown voltage is only 510 volts per mil and the leakage excessive. We do not recommend this paper for use on production . Hs{Lord Ernest Hives - Chair}/Wst. | ||