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).
Leakage and insulation resistance test results for four coil cases.
| Identifier | ExFiles\Box 69\1\ scan0060 | |
| Date | 10th June 1927 | |
| To Sft{Mr Swift}/Mr. Brock. X4079 X8710 EFCA/T10.6.27. X4079 COIL CASES. Herewith we return to you the fourth of the four coil cases recently received from you for leakage tests. The three already returned to you have passed the test satisfactorily, but this fourth one is slightly down in insulation resistance, and we suggest that you should give it a further baking and hand it back to us for further test to see if it will then come within our limit in respect of which it is a little outside at the moment. EFC. | ||