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 horsepower (2,090 kW), reduced armament of six 0.50 inch (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. When fitted with a GE CH-5 turbosupercharger, the XP-47J achieved a top speed of 440 knots
(505 mph, 813 km/h) in level flight in August 1944, making it one of the fastest piston engine fighters ever built. However, by that time Republic had moved on to a new concept, the XP-72.
just fun to read!!
was looking for a jug from european theator that was hotroded and polished but cant remember who's it was or the stats on boost, seems like 80 psi was the number and the pilot had the fastest jug in europe, think it was a 47 d-40 any help would be app.
this pic is for Triple5 or tripled not sure which (sorry) who said jugs didn't have a wastegate!!
look closer