Instructions detailing the replacement of a broken ballast wire in a Delco ignition coil on a Packard car.
| Identifier | ExFiles\Box 127\1\ scan0100 | |
| Date | 15th June 1920 | |
| RR 300 (120B) (SF 349 24-1-19) MP 200552 X.435 91025 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To S.F.C. 15/6/20 -19 Order No. X 435 Customer's No. FB 92 Re. Delco Ignition Coils on Packard Car The ballast on one of these coils has broken down. The wire was 7.5" long .012" diameter & had an aprox. res. of .74 W. We have put on a new wire of nickel 5.5" long .011" diam. Aprox res of .7 W. This is now working quite well Signed [Illegible Signature] This Sheet must be filed on completion of the work. | ||
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).