So the 'expert' could only come up with "water might not be good enough to transfer the amount of heat that will be produced"? That's not much of a hurdle, rea

So the 'expert' could only come up with "water might not be good enough to transfer the amount of heat that will be produced"? That's not much of a hurdle, really. Start with different materials: use coolant, for starters, instead of water. Also: the vehicle is being levitated by powerful fans.