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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 K.L.G. Sparking Plugs Ltd. regarding the failure of E.26 and E.25 type plugs.

Identifier  ExFiles\Box 162\4\  img276
Date  19th March 1937
  
60018.

Rm{William Robotham - Chief Engineer}/Wst.8/AP.

19th March 1937.

K.L.G. Sparking Plugs Ltd.,
Putney Vale,
LONDON S.W.15.

Dear Sirs,

We are returning to you under separate cover 6 -E.26 type plugs. The electrodes of these plugs are badly burnt after 7 hours run. We also return 1 - E.25 type plug, which has a broken insulator; this plug has done about 3000 miles. We should like to know what you propose to do, about the latter failure.

Yours faithfully,

FOR ROLLS-ROYCE LTD.
  
  


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