Autobus with ultrasound excited high-voltage lifter's thrusters. Equation F = (4 · W2 · S · ρ)⅓ is genuine derivation of Andrija Radović. This versatile equation is applicable to airfoil too. Non-ideal case is F ≤ (4 · W2 · S · ρ)⅓.
For anything to go up (F) something else (ρ) must be energized (W) to go down pushed trough/by area (S): F = force, W = power, S = surface area, ρ = fluid density.