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).
Instructions and test results for a Bleriot-Phi electrical cut-out with a compensating coil.
| Identifier | ExFiles\Box 48\3\ Scan180 | |
| Date | 3rd January 1921 | |
| R.F. 300 (120B) (SF 349 24-1-19) MP 200552 88268 ROLLS-ROYCE LIMITED. INSTRUCTIONS. 3-I-1921 To Order No. 35 Customer's No. 1 Re. X 4215 Bleriot-Phi Cut-out, Resistances in compensating coil. Operated from Westinghouse dynamo without battery, the cut-out will work without vibrating with 13 Ohms extra resistance inserted in the compensating winding. Volts to cut-in 13.3 Amperes .. .. ·184 Ohms .. .. 72.2 Amps after cutting in ·099 Ohms 134.0 Volts to cut out 13.1 Amps " " " ·098 Ohms 134.0 Amps after cutting out ·175 Ohms 75.0 Signed This Sheet must be filed on completion of the work. (Contd) | ||