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).
Circuit diagram of the Bleriot-Phi system.
| Identifier | ExFiles\Box 48\3\ Scan208 | |
| Date | 15th February 1921 | |
| X.4215 X.681. X.1402. X 4215 Res Vib. Reg. Se Cut out a Sk Normal Load Heavy Load + - Sh Se CIRCUIT DIAGRAM OF BLERIOT-PHI SYSTEM. EFC. {E. Fowler Clarke - Electrical Engineer} 15.2.21. R.R. 286. (10M 7) B.H. 798 10-12-20. G 2947 | ||