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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).
Alteration to a piston ring drawing to specify clearance for shop practice.

Identifier  ExFiles\Box 16\1\  Scan132
Date  21th July 1914
  
R.R. 235a (150 H) (V.V. 681 12-5-14) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 0414.

RE PISTON RINGS. X.741.

On 21. 7. 14. the piston ring drawing was
altered to bring same into conformity with shop practice,
namely, 2 to 3,000 [handwritten: thous.] clearance was allowed between the
width of the ring and the width of the groove.

The piston groove on E.4237A being .187 ± 1/4.

[Watermark: DICKINSON BOND 1804 MADE AT CROXLEY]
  
  


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