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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 regarding the performance and examination of K.L.G. sparking plugs after misfiring issues due to excessive lead deposit.

Identifier  ExFiles\Box 162\5\  img036
Date  30th July 1937
  
Child
6001,
K/W.
Bur/Wst.
PK/KC/DPB/30.7.37.

K.L.G.Sparking Plugs
type FLB.30.X.

Chassis No.B.161.HM.{Capt. W. Hallam - Head Repairs}
Bontor.

We are returning as a matter of interest to you under cover of our advice note No.5096 six FLB.30.X plugs which were fitted to the above chassis at mileage 3535.

This owner is a man whom I know personally and takes great interest in his car. He uses Ethyl fuel and is fully aware of the consequences. He lives very near to the K.L.G.Works and a day or so ago, experienced the usual misfiring trouble, so trotted around to see them. They cleaned and set the plugs and told him that there was excessive lead deposit present and that they had not seen a worse case. The plugs behaved normally after the cleaning and re-setting process until this morning, after 347 miles, when the low speed mis-developed.

I therefore took the opportunity of fitting another set of FLB.30.X plugs, so that I could get hold of these plugs and return them to you for examination and test, in order if there is anything to be found out from them, you will be able to then talk to K.L.G.

This is not a complaint case and these plugs are not being sent back to you in the nature of a complaint - but just as a matter of interest.

PK/KC.

Tested on Bentley by Brazier.
No failure.
  
  


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