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 performance of modified ignition plugs designed for easier cleaning.

Identifier  ExFiles\Box 34\2\  Scan099
Date  14th May 1918
  
R.R. 225 A (400 T) (S.C. 536. 15-2-16) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1546.
To EH. from R.{Sir Henry Royce}
c. to CJ.
X.2514
R4/G14.5.18.
X.2514.-
X.2517. -RE IGNITIONS PLUGS.
You will remember sometime ago you made some ignition plugs which were very good, which were modified by us to make them more practical for cleaning. We should be glad to know if these plugs have been made, and have shown any advantage. See other memo on jump spark distributor and sooty ignition plugs.
R.{Sir Henry Royce}
  
  


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