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).
The replacement and examination of 20 HP ballast resistances.
| Identifier | ExFiles\Box 54\5\ Scan269 | |
| Date | 3rd June 1924 | |
| X.3485 To RHC. {R. H. Coverley - Production Engineer} from EFC. {E. Fowler Clarke - Electrical Engineer} c. Hs {Lord Ernest Hives - Chair} /TMW. EFC {E. Fowler Clarke - Electrical Engineer} 6/T3.6.24. X.3485 - 20 HP. BALLAST RESISTANCE. Herewith we hand you two present standard up-to-date standard ballast resistances. We should be glad if you would have these fitted to 3GII and 7GII, replacing the ballast resistances at present thereon, which latter kindly return to us for examination. These will have done a considerable number of miles. In the case of 3GII the ballast resistance has always been one of 15" length of wire in place of the standard 25". It would therefore be all the more instructive to examine the condition of this particular ballast, included in which examination will be a tension test on the wire composing the resistance, in comparison with a similar test on new wire at present being used. EFC. {E. Fowler Clarke - Electrical Engineer} Fitted to 3GII 14/7/24. RHC. {R. H. Coverley - Production Engineer} | ||