Rolls-Royce Archives
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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).
Report page discussing the results of engine testing related to valve lift, clearance, and horsepower.

Identifier  ExFiles\Box 13\2\  02-page152
Date  29th October 1931 guessed
  
-2-

us greater duration of opening on the inlet valve.
We might also gain from a greater lift on the exhaust valve. A test with the 114º shaft A.{Mr Adams} shewed that if the exhaust valve clearance was increased to .030 a drop of 5 B.H.P. ensued at 3000 R.P.M.

Hm{Capt. W. Hallam - Head Repairs}/Hn.{F. C. Honeyman - Retail orders}
  
  


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