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 double ballast resistances made from a nickel-manganese alloy called 'Mangonic'.
| Identifier | WestWitteringFiles\P\2July1926-September1926\ Scan124 | |
| Date | 2nd September 1926 | |
| Contd. -2- EFC3/T2.9.26. In addition to the above double ballast resistances of wire of standard composition, we are also trying out double ballast resistances of wire of so-called "Mangonic" material, i.e. a nickel which contains 3.65% manganese. From analysis it would appear to be more nearly similar in composition to the ballast resistance wire used on the Remy ignition and we anticipate that, like the Remy, it will give a volt-ampere characteristic curve which does not shew so much of a turn-up at the higher loadings. Photostat copy of the Remy ballast resistance wire characteristic curve is also attached. EFC. | ||