A Boeing KB-50J refuels an North American FJ-4B Fury. Note that the Fury is from VMA-214, the famed Black Sheep Squadron led by Maj. Pappy Boyington in WWII. The engines on the B-50 were nuts: 28 cylinders, 4,362.5 cu in of displacement, 4,300 hp. It was the largest radial engine ever built in the US, and they made almost 19,000 of them. The KB-50 in the photo also sports a couple of early turbojets to help keep ahead of the fighters.