The P-47 was the first single-seated fighter to be equipped with a supercharger paired with a 2000hp engine, allowing it to fly at the same very high altitude as bombers. The P-47 was armed with eight 12.7mm machine guns. With the P-51 Mustang, the Thunderbolt constituted the main fighters of the US Army Air Force. This is the representation of P-47D early production that was nicknamed "razorback" because of the shape of its upper fuselage behind the cockpit. The P-47D was a high-speed, high-altitude capable fighter and escorted the allied bombers that were conducting raids over Germany. Its 1-ton payload and its robustness made the Thunderbolt the perfect aircraft for ground attacking missions.