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).
Investigation into faulty 40/50 coil No.582, which appears to have an intermittent break and partial short circuit.
| Identifier | ExFiles\Box 46\3\ Scan190 | |
| Date | 11th September 1923 | |
| X3445 To Mr. Brock. EFC3/T11.9.23. X. 3445 - 40/50 COIL. Herewith faulty 40/50 coil No.582 submitted to us for investigation. It appears that the coil is subject to a combination of an intermittent break and an intermittent partial short circuit in the secondary winding. EFC. | ||