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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).
Suggesting a modified valve timing for the Sports Phantom to improve high-speed output.

Identifier  ExFiles\Box 22\4\  Scan146
Date  23th April 1927
  
To Hs.{Lord Ernest Hives - Chair} from E.{Mr Elliott - Chief Engineer}
c. to BJ. BY.{R.W. Bailey - Chief Engineer}

X3588

E1/M23.4.27.

SPORTS PHANTOM. X.3588 X.5770
X.8060 X.5771

Referring to the report giving comparison of Lorraine output with output of 20 HP. engines under different conditions, R.{Sir Henry Royce} suggests that on the Sports Phantom or any other sports chassis, we should have a mark'd valve timing, more suitable for output at high speed. It will be expected that some sacrifice of B.M.E.P. at lower speeds will be sustained by such an alteration, as will be seen from the Lorraine curve.

E,
  
  


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