Rolls-Royce Archives
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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).
Performance graph of a U.S.A. Bosch Dynamo, plotting ampere output against speed under hot and cold conditions.

Identifier  WestWitteringFiles\E\November1920\  Scan64
Date  19th November 1929
  
AMPERE OUTPUT
DYNAMO SPEED (R.P.M.)

With Specified Performance
U.S.A. Bosch. (COLD)
U.S.A. Bosch. (HOT)

U.S.A. Bosch Dynamo. Cold and fully hot output curves. with curve of specified hot performance of dynamo for R.R. Car.

FIGURES ON CURVES REPRESENT OPERATING VOLTAGES

U.S.A. Bosch. FIELD CURRENTS
COLD
HOT

525 540 610 RPM
12.4 13.6 13.6 VOLTS.

Data points on curves: 14.6, 14.0, 14.85, 14.35, 13.6, 14.0, 14.35, 13.2, 14.1, 13.85, 13.35

AJM/19-11-29
E.F. C. 19. 11. 29
  
  


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