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).
Graph of Ignition Advance versus B.M.E.P. curves for different Aluminium Phantom engine configurations at 1000 RPM.

Identifier  ExFiles\Box 17\6\  Scan012
Date  11th December 1928 guessed
  
SHEET. 1.
IGNITION ADVANCE / B.M.E.P. CURVES FOR 1000 R.P.M.
(CORRECTED TO N.T.P.)
BMEP (LBS PER SQ. IN.)
ALUM PHANTOM WITH HEAD TO L.E.C. 2230. (COMP. RATIO = 4.85 : 1).
ALUM PHANTOM (4.69 : 1)
ALUM PHANTOM WITH 1.600 DIA. VALVES. (COMP RATIO 4.69 : 1)
IGNITION ADVANCE ON FLYWHEEL (DEGREES)
(BOTH IGNITIONS SYNCHRONISED.)
  
  


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