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).
Specification details for Z4 resistances, including dimensions, electrical properties, pricing, and supplier information.
| Identifier | ExFiles\Box 76\2\ scan0085 | |
| Date | 1st December 1924 | |
| Contd. -2- EFC/T5.12.24. The exact specification of these resistances would be their Z4. 8½" x 1⅜" of 1.8 ohms, maximum ampere capacity 11. On 14 volts the loading of each of these resistances is approximately 8 amperes, and the three of them would provide a convenient means of dissipating current from the terminals of the battery when required. The list price of each resistance is 7/- and they can be obtained from:- "The Zenith Manufacturing Co., Zenith Works, Villiers Road, Willesden Green, N.W.2." [Watermark text: DICKINSON BOND EFC. 1804 MADE AT CROXLEY] | ||