[Yo-Yo]

The P&W radial engines like the one in the P47 had turbosuperchargers and water injection (2,535 horsepower). Some planes designed for shooting down buzz bombs had 2800 h.p. I imagine that today we could come up with something just as good or better.

Douglas A2D Skyshark Wikipedia page

"Powerplant: 1× Allison XT-40-A-2 turboprop, 5,100 shp (3,800 kW)" And this was in 1950...

The Allison T56 Turboprop used on the C-130, P-3, E-2 and C-2 develops in the neighborhood of 4,000 HP.

T56 weighs just under 2,000 lbs, while the Wright R3350 of the A1 Skyraider produced 2,700 HP while weighing over 2,600 lbs.

[nascarnation]

My SIL works for Allison which is now part of Rolls Royce.

[smokingfrog]

The first production A2D-1 performed its initial flight on 10 June 1953, with four more Skysharks delivered to the end of the year. Problems continued, with one of the A2D-1s crashing near Los Angeles on 5 August 1954. Some sources claim the rest of the batch of ten were completed, but they never actually flew. One of these machines still survives today -- at last notice, it was being refurbished for display by a warbirds restoration outfit in Idaho Falls, Idaho.