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).
Performance graph plotting dynamo ampere output against dynamo speed and chassis M.P.H.
| Identifier | ExFiles\Box 163\6\ img281 | |
| Date | 4th May 1933 guessed | |
| AMPERE OUTPUT 16 14 12 10 8 6 4 2 0 DYNAMO SPEED 0 400 800 1200 1600 2000 2400 2800 CHASSIS M.P.H. 11/50 AXLE 0 5 10 15 20 25 30 35 | ||