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).
Specification and photographic comparison of Champion NA 8 and LB 8 spark plugs.

Identifier  ExFiles\Box 162\2\  img009
Date  23th February 1940 guessed
  
CHAMPION NA{Mr Nadin} 8
REACH: .900"
LENGTH OF BARREL: .850"
LENGTH OF INSULATOR: 2.200"
INSULATOR MATERIAL: SILLIMANITE
REMARKS: OBTAINED FOR TEST ON PH. III

CHAMPION L B 8.
REACH: .600"
LENGTH OF BARREL: 1.150"
LENGTH OF INSULATOR: 2.350"
INSULATOR MATERIAL: SILLIMANITE
REMARKS: OBTAINED FOR TEST ON 25/30

& BENTLEY
  
  


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