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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).
Performance results and flooding issues with Spectre carburetters on the 20/25 model.

Identifier  ExFiles\Box 102\1\  scan0262
Date  13th February 1935
  
To E.{Mr Elliott - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}
c. to WoR.{Arthur Wormald - General Works Manager}
c. to By.{R.W. Bailey - Chief Engineer}

x5050

Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}9/KW.13.2.35.

SpectreCodename for Phantom III Carburetters.

We are getting better results with the reversed throttle slow running on the 20/25 than we are with the normal carburetter. This applies to petrol consumption.

The flooding difficulty with the SpectreCodename for Phantom III carburetter is a serious one. The difficulty with the Bentley type of throttle adjustment provided for the SpectreCodename for Phantom III is that you cannot set each carburetter individually.

Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}
  
  


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