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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 modifications to self-adjusting tappets and rocker bushes for model 28-EX.

Identifier  ExFiles\Box 17\6\  Scan284
Date  18th July 1934
  
x7060

RHC.{R. H. Coverley - Production Engineer} From Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell}

Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell}5/MA.18.7.34.

Will you please carry out the following for use on the set of Self-adjusting tappets which are being prepared for 28-EX.

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A set of 8 oil metering screws to Hs.{Lord Ernest Hives - Chair}1470, the existing screws (E.85577) allowing to great a flow of oil.

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Modify existing rocker bushes to Hs.{Lord Ernest Hives - Chair}1471 and in conjunction with this modification, drill .031 dia. holes in the valve end of each rocker. These are at present blanked.

Hs{Lord Ernest Hives - Chair}/L.H.Swindall.
  
  


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