Known principle, not solved explanation
MIT demonstrated an aircraft using ionic wind: high-voltage fields ionize air, accelerate ions and transfer momentum to neutral molecules. That does not explain an advanced orb, but it proves thrust without moving parts is physically possible in air.
The Pais patent is not treated as proof of working craft. It is used only as a conceptual reference for cavity, RF/microwave, charged surfaces and plasma/sheath interfaces.
| Mechanism | What it could explain | Limitation |
|---|---|---|
| EHD / ionic wind | Silence, no rotor, visible ionization, thrust without moving parts. | Current public thrust is weak; high voltage and low efficiency. |
| DBD / plasma actuators | Active skin altering flow; visible/invisible transitions; corona color. | Usually small forces; extreme engineering required. |
| MHD / plasma sheath | Lorentz force on ionized air/plasma; vector control by sectors. | High fields/currents and large energy demand. |
| Non-public field/medium interaction | Silent hover, maneuver, invisibility-like modes. | Not validated publicly; remains advanced-technology hypothesis. |