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).
Query regarding the testing conditions for ignition coils at varying temperatures under compression.
| Identifier | ExFiles\Box 45\4\ Scan201 | |
| Date | 5th September 1923 | |
| x4079 PN{Mr Northey}5/DN/5.9.23. TO EFC. FROM P.N. Referring to your report on Ignition coils in cases of various materials, Ref. EFC1/T3.9.23, will you inform me please whether the tests at varying temperatures were made with the six spark gaps in a container under compression ? P.N. | ||