Instructions and descriptions for the X.8650 automatic switch.
| Identifier | ExFiles\Box 64\3\ scan0200 | |
| Date | 27th October 1925 | |
| X8650 [REDACTED] C. EFC. {E. Fowler Clarke - Electrical Engineer} BY {R.W. Bailey - Chief Engineer} /RD7/ML27.10.25. X.8650 - AUTOMATIC SWITCH - E.A.C.11. In order to straighten out the many instructions on this switch, we send you herewith prints and descriptions to cover memos previously issued and to summarise exactly what should be fitted on these switches. D.70949 - Main Coil - Wound with 24 S.W.G. wire see - EFC {E. Fowler Clarke - Electrical Engineer} 3/T15.10.25 and BY {R.W. Bailey - Chief Engineer} /RD12/W17.10.24. D.70950 - Auxiliary Coil - Wound with smaller size heavy winding D.70868/9 and 27 S.W.G. Upper Winding - See EFC {E. Fowler Clarke - Electrical Engineer} 3/T4.11.24, EFC {E. Fowler Clarke - Electrical Engineer} 2/T6.11.24, BY {R.W. Bailey - Chief Engineer} /RD4/ML5.11.24, & BY {R.W. Bailey - Chief Engineer} /RD1/ML7.11.24. D.70951 - Connector (Aux: Switch) - To suit smaller size heavy winding. 1 blueprint of each attached. BY {R.W. Bailey - Chief Engineer} /RD. | ||
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).