BAE Systems plays a critical role in some of the world's biggest defence aerospace projects. In the UK, the company makes large sections of the Typhoon Eurofighter and assembles the aircraft for the Royal Air Force. 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. It also manufactures the Hawk, the world's most successful jet training aircraft. Airbus UK also manufactures the wings for the A400 m military transporter. Rolls-Royce is the world's second-largest aero-engine manufacturer. Its engines power more than 30 types of commercial aircraft and it has more than 30,000 engines in service in the civil and defence sectors.