The Queen Elizabeth Class is a series of two new aircraft carriers, which are still under construction by BAE System for the British Royal Navy. With a length of 280 m (920ft) and a beam of 39 m (128ft), they will be much larger than the former Invincible Class carriers. The two Queen Elizabeth Class carriers will displace 65,000 tons, and will be able to carry up to 40 F-35 fighter aircraft, plus attack and anti-submarine helicopters; the F-35 fighters will take off a forward sky-jump flying deck. They will be fitted with two bridges: the aft one will control take-off and landing of aircraft, the forward one will take care of the ship functions. Powered by two Rolls-Royce Marine Trent MT30 gas turbine generator units, they will be able to sail at the maximum speed of 26 knots (47km/h), with a range of 10,000 nautical miles (19,000 km). Their defensive armament will consist of Phalanx CIWS guns, 7,62mm miniguns, and 30mm cannons. The first of the carriers, HMS Queen Elizabeth R08, will be delivered to the Royal Navy in 2016, and the second, HMS Prince of Wales R09, in 2018.