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).
Responding to a query about temperature tests of coils housed in cases of various materials.
| Identifier | ExFiles\Box 45\4\ Scan202 | |
| Date | 9th September 1923 | |
| X4079 To PN.{Mr Northey} from EFC. EFC3/T6.9.23. X.4079 - TEMPERATURE TESTS OF COILS IN CASES OF VARIOUS MATERIALS. Answering your PN{Mr Northey}5/DN/5.9.23, these tests were made with ordinary spark gaps in air. EFC. | ||