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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 dynamo output speed curves for the N.2 Series Chassis under various load conditions.

Identifier  ExFiles\Box 163\6\  img150
Date  5th May 1932
  
OUTPUT SPEED CURVES
OF DYNAMO TO BE FITTED TO N.2. SERIES CHASSIS
TAKEN AT 30°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.

Y-Axis (Left): AMPERE OUTPUT, 0, 1, 2, 3, 4, 5, 6, 7. OPERATIN, 14.00, 14.40, 14.80, 15.20, 15.55, 15.90, 16.30, 16.50.
X-Axis (Top): 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.
X-Axis (Bottom): 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.
  
  


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