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).
Graph of the volt-ampere characteristic for a standard ballast resistance made of nickel wire.
| Identifier | WestWitteringFiles\P\2July1926-September1926\ Scan125 | |
| Date | 13th May 1926 | |
| AMPERES. VOLTS. VOLT-AMPERE CHARACTERISTIC OF R STANDARD BALLAST RESISTANCE. (25" OF 31 S.W.G. NICKEL WIRE) H.E.W. 13-5-26 | ||