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).
Graph showing representative output curves for a Standard 'R' 20 HP Dynamo under various conditions.

Identifier  ExFiles\Box 51\1\  Scan365
Date  18th August 1924
  
REPRESENTATIVE OUTPUT CURVES OF STANDARD 'R' 20 H.P. DYNAMO UNDER VARIOUS CONDITIONS

AMPERE OUTPUT
OPERATING VOLTAGES
DYNAMO R.P.M.
CHASSIS M.P.H. 11/50 AXLE 31" x 4" DIA TYRES

Curve Labels:
1) Output at 70% set by General Specification
2) Output at 66% set by General Specification
3) General specification
4) Output at 83% set to production test
5) Nett minus ignition current

Field current at 70% set by General Specification
  
  


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