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).
Graph of ampere-output speed curves for a Delco Dynamo from a Marmon Car.
| Identifier | ExFiles\Box 180\M1\7\ img010 | |
| Date | 19th October 1921 guessed | |
| AMPERE-OUTPUT — SPEED CURVES OF DELCO DYNAMO FROM MARMON CAR Figures on curves give operating voltages. Y-Axis: AMPERE OUTPUT, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24 X-Axis: R P M, 0, 500, 1000, 1500, 2000, 2500, 3000, 3500 Top Curve Data: 8.55, 8.2, 8.2 STARTING, 8, 7.6, 7.35, 7.0 Middle Curve: SPEC'Y Bottom Curve Data: 7.4, 7.4, 7.15, 6.8, 6.6, 6.2 Lower Left Data Points: 7.0, 7.5, 6.6, 7.25, 6.8 | ||