o give the correct mixture strength at lowengine speeds, the mixture, as regulated by the needle valve,would be too rich at any higher speed. This disadvantage ispartly overcome by fitting an air inlet valve F. The area ofthis inlet opening and the air flow depend upon the differencebetween the… … FiGt. 53.—Carburettor.The weight of the petrol flowing from the orifice dependsupon :— (a) The pressure of the air at D. (b) The area of the petrol orifice. (c) The viscosity of the petrol. (d) The difference of head h between the petrol in the tankand the petrol orifice. Assume— V = velocity of…
Airplanes
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