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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).
Dynamo charge rates for the 20/25 HP chassis, referencing blueprints for fitting a 40/50 dynamo.

Identifier  ExFiles\Box 163\6\  img182
Date  30th June 1932
  
X6016
To E.{Mr Elliott - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Wst.
Hs{Lord Ernest Hives - Chair}/Wst.3/AD30.6.32.
X6005

20/25 HP. DYNAMO CHARGE

We are sending you as requested, three blue prints showing the rates of dynamo charge suggested for the 20/25 in the event of the 40/50 dynamo being fitted. This gives a winter and summer charge position incorporating two grades of resistance and the full dynamo charge when head lamps are on only.

We shall be glad if an early decision can be made with R.{Sir Henry Royce} about the whole question of dynamo charge on all our chassis.

Hs{Lord Ernest Hives - Chair}/Wst.
  
  


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