King Tiger

[Phil Davies (FGM)]

I am pretty sure that the KT didn't use a Panther engine but used the Tiger 1 with bored out cylinders, this made the thickness of steel between each cylinder very thin and the strain from trying to move 65 tons of steel over rough terrain often caused the walls of the cylinder to crack and split.
The Germans as we all know didn't have time to trial the tank properly and they had to use what was to hand as the tank was needed in frontline there and then not after another six months of trials and testing.