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).
Cover note for a production test and inspection of a double value ballast resistance for an ignition coil.
| Identifier | ExFiles\Box 70\4\ scan0014 | |
| Date | 26th November 1927 | |
| X8781l To BY.{R.W. Bailey - Chief Engineer} from EFC. c. Sft{Mr Swift}/Mr. Brock. c. Test Dept. EFC1/T26.11.27. DOUBLE VALUE BALLAST RESISTANCE. Herewith please find copy of Production Test & Inspection of Ballast Resistance (double value) for Ignition Coil. EFC. | ||