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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).
Letter to Delco-Remy Corporation seeking clarification on direction indicators and dynamo specifications.

Identifier  ExFiles\Box 173\3\  img079
Date  13th April 1934
  
Exptl. Dept.

Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}11/KW.
13th April, 1934.

Mr. Dawson,
Chief Engineer,
Delco-Remy Corporation,
Muncie, Indiana, U.S.A.

Dear Mr. Dawson,

I hope that the Direction Indicators arrived safely, as I understand that they were sent off a few days before I got back.

On going through the information you gave me, there are one or two points I should like to confirm, if you can find time to write :-

(1) Do you dynamically balance your armatures ?

(2) I have a figure of 120°C. as the maximum running temperature of your dynamo armatures. Is this a clerical error on my part, or do your machines actually get as hot as this ? If so, do you use special solder, and what wire insulation do you employ to withstand these conditions ? We find that the charring temperature of our cotton insulation is 105°C.

(3) I would very much like a performance curve of the new La{L. A. Archer} Salle dynamo if it is available.

Yours faithfully,

FOR ROLLS-ROYCE LIMITED.
  
  


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