The P-47 was a big (7 Ton) and very powerful high-altitude fighter, commonly called "the Jug". The project started from 1939. And Deliveries started late in 1942. A total of 15683 this US fighter aircraft were built in WWII. The early P-47 was designed as an interceptor, but later it proved to be an outstanding combat plane both in bomber escort and ground attack duty. This model was the major production version, and 6,315 were built. This aircraft was power by a water-injected version of the 2,000hp R-2800 engine, which gave it a top speed of433mphat 30,000 feet. the P-47 models prior to D-25 became known as "Razorbacks."