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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).
Instructions for a series of tests on insulation, sparking plugs, and commutators.

Identifier  ExFiles\Box 24\2\  Scan048
Date  24th January 1919
  
RR.300 (120B) (SF 349 24-1-19) MP 209552
88224
ROLLS-ROYCE LIMITED.
INSTRUCTIONS.
To
Order No.
Customer's No. 19
Re Insulation Testing (Cont'd).

① soak in water + weigh periodically. Test breakdown.
② Repeat using mineral oil.
③ For sparking plugs, as above, and test for heat-resisting qualities, by placing on metal plate over gas flame. (all samples under comparison together) Then test breakdown.
④ Make up into plug and test on pro engine.
⑤ For commutators as 1, 2 + 3, and also test for uniformity of thickness with micrometer. Test variety of splitting.
(cont'd)

Signed
This Sheet must be filed on completion of the work.
  
  


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