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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).
Proposal for a three-charge dynamo scheme on the 20/25HP model, including suggestions for re-engraving the switch case.

Identifier  ExFiles\Box 163\6\  img173
Date  16th June 1932
  
X6016

By.{R.W. Bailey - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Wst.
c. to E.{Mr Elliott - Chief Engineer}
c. to WCr.

Hs{Lord Ernest Hives - Chair}/Wst.3/MA.16.6.32.

20/25HP THREE CHARGE SCHEME ON DYNAMO.

Referring to E5/HP11.6.32., dealing with the proposal for a three charge dynamo scheme on the 20/25HP we should be glad if you will arrange to instruct, experimentally a new 20/25HP switchbox arranged to excite and insert one stage of resistance in the dynamo field winding in the first position along with the ignition switch and a second stage resistance in the second position.

The switch case will require reengraving we suggest as follows :-

(a) First position.

I & C WINTER.

(b) Second position

I & C SUMMER

Hs{Lord Ernest Hives - Chair}/Wst
  
  


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