Vehicle control

An aircraft comprising a control system configured to cause the aircraft to execute a manoeuvre, the control system comprising:

• at least one compressor arranged to generate compressed fluid having a massflow rate;
• at least one fluidic control effector in fluidic communication with the at least one compressor and arranged to change the direction of travel of the aircraft when the compressed fluid is incident on the at least one fluidic control effector, the at least one fluidic control effector being associated with a respective control valve;
• a dump duct for expelling excess compressed fluid not delivered to the at least one fluidic control effector out of the aircraft;
• a dump valve for controlling the massflow rate of compressed fluid delivered to the dump duct;
• a flowrate sensor disposed between the compressor and the dump valve;
• and
• a controller electrically coupled to the dump valve and configured to adjust the dump valve and the at least one control valve
• wherein the controller is configured to:
• open the control valve to allow fluid to flow to the at least one fluidic control effector;
• use the flowrate sensor to measure an instantaneous massflow rate;
• compare the instantaneous massflow rate with a predetermined massflow rate;
• and
• adjust the dump valve such that the instantaneous massflow rate is equal to the predetermined massflow rate.