BAE Systems makes large sections of the Typhoon Eurofighter at its sub-assembly plant in Salmesbury and assembles the aircraft for the RAF at its Warton plant, near Preston. It is also a principal subcontractor on the F35 Joint Strike Fighter – the world's largest single defence project – for which it designs and manufactures a range of components including the aft fuselage, vertical and horizontal tail and wing tips and fuel system. It also manufactures the Hawk, the world's most successful jet training aircraft.