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).
Specifications for the ignition, dynamo, starter motor, and battery of chassis 4-EX.
| Identifier | ExFiles\Box 49\2\ Scan186 | |
| Date | 28th June 1923 | |
| X3764 28.6.23. 40/50 CHASSIS 4-EX. X.3764. This chassis is fitted with standard 40/50 ignition and wiring, except that the condenser is an X.4423 paper condenser of increased capacity. The dynamo is a standard Lucas 40/50 machine and is connected up to a Bleriot Phi cutout with no charging switch, so as to be always in operation when the car is running. The starter motor system and actuating gear is the standard 40/50. The battery is an SJR.28 Willard. MADE AT CROMLEY EFC. | ||