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).
Loss of effective mixture control with the semi-automatic carburetter.
| Identifier | ExFiles\Box 102\1\ scan0090 | |
| Date | 16th July 1932 | |
| 85080. X7080 To R.{Sir Henry Royce} From Hs.{Lord Ernest Hives - Chair} c. to Ss.{S. Smith} Wor.{Arthur Wormald - General Works Manager} c. to K.{Mr Kilner} Da.{Bernard Day - Chassis Design} c. to Hdy.{William Hardy} Hy.{Tom Haldenby - Plant Engineer} Hs.{Lord Ernest Hives - Chair}4/HJ.16.7.32. SEMI AUTOMATIC CARBURETTER. When we use our semi-automatic carburetter we lose an effective mixture control as we know it with the present existing carburetter. Although we have controls to operate the jets the range of mixture control varies with the position of the air valve. With the air valve closed the range may be sufficient to nearly stop the engine but as the air valve lifts the range becomes less and less effective. With semi-automatic carburetters the mixture control is used for starting once the engine is warmed up the normal position is full weak. Hs.{Lord Ernest Hives - Chair} | ||