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).
Continued technical explanation on the disadvantages of an autovac system for maintaining petrol supply to the engine.

Identifier  ExFiles\Box 40\4\  Scan060
Date  3rd May 1923
  
Contd. -2- EFC3/T3.5.23.

[handwritten, struck through: somewhat]
be [struck through: very slightly] greater.

For the car to do the same work, however, would require bigger throttle openings and a more than previously bigger supply of air and petrol, owing to the reduced mechanical efficiency, added to which is the fact that the increased throttle opening would reduce the available suction, so that in three distinct ways, in the circumstances considered, the autovac would be at a disadvantage in maintaining the supply of petrol to the engine.

EFC.
  
  


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