Rolls-Royce Archives
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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).
The unsuitability of Lissen sparking plugs for the 20/25 engine due to over-oiling.

Identifier  ExFiles\Box 58\2\  Scan203
Date  28th May 1935
  
Y6000.
Roy{Sir Henry Royce}/GEA. From Hs{Lord Ernest Hives - Chair}/Wst.
Hs{Lord Ernest Hives - Chair}/Wst.6/MA.28.5.35.
Re. LISSEN SPARKING PLUGS.
We have tested these out on a 20/25 chassis and regret to say that they are not suitable for the engine as they badly overoiled. We regret therefore that we cannot go any further with these plugs at the moment.
Hs{Lord Ernest Hives - Chair}/Wst.
  
  


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