Ready for takeoff! The Republic P47J. Nice one Darren!

The XP-47J began as a November 1942 request to Republic for a high-performance version of the Thunderbolt using a lighter airframe and an uprated engine with water injection and fan cooling. Kartveli designed an aircraft fitted with a tight-cowled Pratt & Whitney R-2800-57(C) with a war emergency rating of 2,800 hp (2,090 kW), reduced armament of six 0.50 in (12.7 mm) machine guns, a new and lighter wing, and many other changes. The only XP-47J was first flown in late November 1943 by Republic test pilot Mike Ritchie. Less than a year later it flew into the aviation history books marking a new milestone for speed <Warren Bodie, Republic's P-47 Thunderbolt, 1994>.

When fitted with a GE CH-5 turbosupercharger, the XP-47J achieved a top speed of 505 mph (440 kn, 813 km/h) in level flight on August 4, 1944 at 34,500 feet over a course in Farmingdale, NY. No piston engine airplane of the WWII era ever flew faster than the speed attained by test pilot Mike Ritchie in the XP-47J. It took nearly half a century for that speed record to be approached again in a piston engine aircraft. On August 16, 1989, Darryl Greenamyer piloted his highly modified Grumman F8F Bearcat to a new FAI certified official world speed record of 483 mph for a piston engine over the course at Edwards Air Force test center. Ritchie's speed record in the P-47J was not exceeded until August 21, 1989 when Lyle Shelton piloted a different modified Grumman Bearcat (with a larger Wright R-3350 Duplex Cyclone engine)and set a new official FAI record at 523.586 mph. Wikipedia. Big and deadly!