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).
Requesting feedback on the performance of a Peto & Radford HDE.13 battery fitted to a Demonstration Car.
| Identifier | ExFiles\Box 38\5\ Scan115 | |
| Date | 19th April 1921 | |
| X3398 To Hr. from EFC. EFC8/T19.4.21. X.3398 - PETO & RADFORD BATTERY. We shall be glad to hear from you as to how the Peto & Radford HDE.13 battery, fitted to the Demonstration Car, is behaving. EFC. | ||