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).
Testing conditions and the sending of points for comparative inspection.
| Identifier | ExFiles\Box 35\6\ scan 235 | |
| Date | 19th January 1927 | |
| Contd. -2- EFC/T19.1.27. of both the screw and lever point. The reversals of current were made approximately every 24 hours of running, each total equivalent run having been 10,000 miles, as before. These points are being sent to Mr. Elliott for comparative inspection with the other points. EFC. | ||