The Char Leclerc is a main battle tank (MBT) built by GIAT, now Nexter of France. It was named in honour of General Philippe Leclerc de Hauteclocque, who led the French element of the drive towards Paris while in command of the Free French 2nd Armoured Division (2e DB) in World War II. The Leclerc is in service with the French Army and the army of the United Arab Emirates. The Leclerc is equipped with a GIAT (Nexter) CN120-26 120mm smoothbore cannon. This cannon is capable of firing the same NATO standard 120mm rounds as the German Leopard 2 and US M1 Abrams, but in practice only French-produced ammunition is issued. The gun is insulated with a thermal sleeve and has an automatic compressed-air fume extraction system instead of the usual bore evacuator. The Leclerc has a unique autoloading system which was specifically designed for it, and reduces the crew to three by eliminating the human loader. The turret of the Leclerc was designed around the auto-loading system in order to avoid the problems common to other tanks with an autoloader. The Leclerc autoloader allows a rate of fire of 12 shots per minute and holds 22 rounds of ready ammunition; it can accommodate up to six different types of ammunition at once, although like most autoloader systems it cannot change ammunition types once a round has been loaded. The most common types are the armour piercing fin-stabilised discarding sabot (APFSDS) with a tungsten core and the high explosive anti-tank (HEAT) round. There are 18 other rounds available for reload. A Leclerc tank can fire while traveling at a speed of 50 km/h on a target 4,000 metres away. The Leclerc has the GALIX combat vehicle protection system from GIAT, which fires a variety of smoke grenades and infra red screening rounds, as well as anti-personnel grenades. The Leclerc has an eight-cylinder SACM (now Wärtsilä) V8X-1500 1,500 hp Hyperbar diesel engine and a Renk AG automatic transmission, with five forward and two reverse gears. The official maximum speed by road is 72 km/h and 55 km/h cross country (speeds in excess of 80 km/h were reported on road). The maximum range is given as 550 km, and can be extended to 650 km with removable external tanks. The “hyperbar” system integrates a Turbomeca TM 307B gas turbine in the engine, acting both as a turbocharger and an APU giving auxiliary power to all systems when the main engine is shut down. The Hyperbar name comes from the unusually high boost pressure of 7.5 bar and the resulting mean effective pressure of 32.1 bar. To compare, the largest diesel engine in the world (the Wärtsila RTA96) has a mean effective pressure of 18.6 bar. In addition, with boost available even at idle, this arrangement also works as an anti-lag system. At a combat weight of just 56 tons, the Leclerc is one of the lightest main battle tanks in the world; this gives it one of the best power-to-weight ratios among the Western tanks (27 hp per ton) and makes it one of the fastest MBTs of its generation (0 to 32 km/h in 5 seconds).