The continuation of a test on a coil, concluding it is an improvement over the standard.
| Identifier | ExFiles\Box 164\5\ img015 | |
| Date | 15th January 1931 guessed | |
| WE70 (contd) (2) it had been heated at 100°C for one hour. The coil was then placed on our transformer rig for breakdown test and after 20 hours test was OK. In view therefore of the maintenance of secondary output when hot we consider that this coil is an improvement over standard. #Ewest | ||
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).