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 showing dynamo output speed curves under various operating conditions.
| Identifier | WestWitteringFiles\W\May1931-August1931\ Scan029 | |
| Date | 27th May 1931 | |
| AMPERE OUTPUT OPERATING VOLTAGES 17 18.70 16 18.50 15 18.30 14 18.10 13 17.90 12 17.70 11 17.50 10 17.30 9 17.05 8 16.80 7 16.50 6 16.30 5 15.90 4 15.55 3 15.20 2 14.80 1 14.40 0 14.00 40/50 OUTPUT SPEED CURVES. OF DYNAMO TO BE FITTED TO N.2. SERIES CHASSIS TAKEN AT 80°C WITH 65°C SETTING. 1. FULL OUTPUT; SUPPLYING BATTERY ONLY, AT MAX: BATTERY VOLTAGES. 2. OUTPUT DURING NIGHT RUNNING, WITH VOLTAGE HELD DOWN TO 14.0 BY HEADLAMPS. 3. OUTPUT DURING DAY RUNNING, WITH RESISTANCE IN THE FIELD CIRCUIT, AND SUPPLYING BATTERY ONLY. AT CONSTANT VOLTAGE OF 14.0 1. 2. 3. DYNAMO R.P.M. 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600 3800 4000 S.S. CHASSIS M.P.H. WITH 11/41 AXLE & 33.0" TYRE DIA: 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 CAR 27-5-31 | ||