Pat is right again
Pat's theory on wing loading is correct. It is figured on wing volume, not sq. inches. I now own Pat's 13 pound FW-190 and fly it in Denver's 6000 ft altitude. I have flown it when it was 100 degrees with a density altitude of about 10,000 feet. It does need a very long runway to land and slow down, but it is a rocket in the air. It has never snapped on me either. I quit flying it because Bonnie doesn't like swastikas in the car.
Take a look at both Ziroli's and Vaillencourt's P-47s. Both are 92 inch wing spans. I have seen a Vaillencourt fly at 50 pounds, you do the math. The Vaillencourt has a much thicker wing than Ziroli's, so the Vaillencourt should carry more weight. You also have to take into consideration that some fuselage shapes are lifting surfaces as well. The full size Skyraider carried as much of a payload as a B-17. Again, because of the thick wing of the full size Skyraider.
Brian