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).
The test results for two tall coils in Nestolite cases, with one being returned for improvement.
| Identifier | ExFiles\Box 49\5\ Scan054 | |
| Date | 22th September 1924 | |
| X. 4273b To SFT {Mr Swift} /Mr. Brock. EFC {E. Fowler Clarke - Electrical Engineer} 1/T22.9.24. X.4273b - TALL COILS IN NESTOLITE CASES. We have put these two coils through our production tests. One of them, TN1, passes the test satisfactorily, but TN2 does not spark satisfactorily on a 6.5 mm. gap (item No.5). Accordingly we are returning this coil to you as we think it may perhaps be improved by more baking. EFC. {E. Fowler Clarke - Electrical Engineer} | ||