Thrust control method for an airbreathing jet engine

An airbreathing jet engine comprising:

• a combustion chamber;
• at least one fuel injection apparatus configured to inject fuel into the combustion chamber;
• at least one static pressure offtake at a first axial location within the combustion chamber;
• at least one static pressure offtake at a second axial location within the combustion chamber;
• at least one pressure transducer, the at least one pressure transducer configured to obtain a value of static pressure at the first axial location, and to obtain a value of static pressure at the second axial location;
• a fuel metering valve;
• and
• a fuel flow controller;
• wherein the fuel flow controller controls a flow rate of fuel provided by the fuel metering valve to the combustion chamber via the at least one fuel injection apparatus based at least in part on a demanded thrust setting for the airbreathing jet engine and a ratio of a value of the static pressure at the first axial location to a value of the static pressure at the second axial location.