If you take two magnets and hold them same pole to same pole they repel, of course
When I've pushed harder on one magnet to bring it closer, I'm sure I felt the increase in pressure in the other magnet, so would an airframe feel that extra effect e.g. during turns?. Would juicing up the elcectromagnet negate that effect a bit I wonder?
Also, would the effect of the mass of the cargo bouncing around the hold off the magnets fixed to the airframe not make the plane wobble?
A mag-lev type platform with the cargo placed on it, with electromagnets that you could ramp up to offset the weight might do it, but again, what would happen if you bank the plane.......?
I feel a junior science moment coming on...