Rolls-Royce Archives
         « Prev  Box Series  Next »        

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 comparison between Lodge 640 and Lodge 641 spark plugs.

Identifier  ExFiles\Box 162\2\  img006
Date  23th February 1940 guessed
  
LODGE 640
REACH: 0.700"
LENGTH OF BARREL: 1.000"
LENGTH OF INSULATOR: 2.200"
INSULATOR MATERIAL: SINTOX
REMARKS: SINGLE & THREE POINT TYPES
OBTAINED FOR TEST ON PH. III

LODGE 641
REACH: .700"
LENGTH OF BARREL: 1.300"
LENGTH OF INSULATOR: 2.600"
INSULATOR MATERIAL: SINTOX.
REMARKS: SINGLE & THREE POINT TYPES,
OBTAINED FOR TEST ON 25/30 & BENTLEY.

Text on spark plugs: LODGE SINTOX MADE IN ENGLAND
  
  


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙