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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).
Query regarding issues with K.L.G. and Lodge sparking plugs during engine testing and a request for a recommendation for a cheap porcelain alternative.

Identifier  ExFiles\Box 33\3\  Scan250
Date  13th November 1924
  
X1812 C.

HS.{Lord Ernest Hives - Chair}
EWT/CEP6/EC13.11.24.

Re. 20-HP & 40/50-HP Chassis Testing - Sparking Plugs.

We find it beneficial during the routine of unit engine testing and the quietening of engine gears to use a plentiful supply of oil for lubrication purposes.

We have however, experienced trouble with the standard K.L.G. and Lodge Sparking Plugs and find they will not stand up to this extra oil supply, particularly the mica plugs.

Will you kindly advise us, if you can with your experiences, recommend a cheap porcelain sparking plug which you consider will stand up to the conditions of testing outlined above.

Plugs are required for light running only no power work

EWT/CEP.
Nps
  
  


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