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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).
Misfiring Bentley sparking plugs at high engine revs when hot.

Identifier  ExFiles\Box 58\2\  Scan190
Date  30th April 1935
  
HS.{Lord Ernest Hives - Chair}
WST r6000.

Hd{Mr Hayward/Mr Huddy}/SB{Mr Bull/Mr Bannister}18/IB.30.4.35.

re Bentley Sparking Plugs.
-------------------------

We have received from Kingsbury several
sets of sparking plugs removed from Chassis due
to complaints of misfiring at high engine revs.
when hot. Kingsbury state that these plugs
appeared to be quite satisfactory when submitted
to the usual pressure test.

We shall be glad if you will examine
these plugs and let us know if there is anything
to account for the trouble.

Hd{Mr Hayward/Mr Huddy}/SB{Mr Bull/Mr Bannister}
IB
  
  


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