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).
Testing and replacement of 1.5 value ballast resistances.
| Identifier | ExFiles\Box 168a\5\ img039 | |
| Date | 9th February 1929 | |
| X7720 EP.{G. Eric Platford - Chief Quality Engineer} from EFC. EFC5/T9.2.29. 1 1/2 VALUE BALLAST RESISTANCES Will you please let us have the two standard ballast resistances which were replaced by the two ballast resistances of 1 1/2 value which we sent to you for test. We desire to return these to Mr. Brock in order to obtain two further 1 1/2 value ballast resistances to replace our stock. EFC. Reed. | ||