Another crazy cheap weapon idea - a bouncing/rolling ball bomb designed to throw tank tracks. The idea is that a drone flies horizontally and drops a ball bomb to fall short. The ball bounces/rolls toward the tank, ideally exploding when it hits a road wheel to throw the track.
At that point, the tank is immobilized - it’s a sitting duck for an inexpensive artillery shell to take it out.
The point is, the weight of an explosive required to throw a track can be much less than a warhead suitable for directly knocking out a main battle tank. And the geometry of rolling/bouncing a ball horizontally to hit the tank treads is favorable - it reduces a 2d aiming problem to a 1d aiming problem.
It’s kind of a land equivalent of a torpedo bomber, but dumb balls are a lot cheaper and simpler than torpedoes.
Because the ball bomb doesn’t need to be powerful enough to directly knock out a main battle tank, a drone might carry several of them - to attack multiple targets per sortie. The ball bombs could still be powerful enough to directly take out softer targets.
