The "Silent Ventus" drone is a low-noise system, that uses probably ion propulsion. The noise of that system is about 70 dB. And that thing means the great breakthrough of ion technology. An ion engine or ion thruster can use any type of ion for its thrust. If the system must change to use the different polar ions the only thing that this system must do, is to change the poles of the acceleration track.
The only thing that denies the ion-engine drone to fly to the orbital trajectory is a power source. The "Silent Ventus" can be the pathfinder for the next-generation low-noise space systems. The idea is that the ion-driven space shuttle can rise to the low-earth orbital from regular parking lots. The silent ion system can remove the noise problems of regular rocket engines.
But if the ion engined drones use remote-electric load. The remote electric transfer can happen by using coherent high-power radio impulses. They can fly to the orbital trajectory quite easily. While that drone flies in the atmosphere it can use ionized air to give thrust. And when the air pressure turns low. The drone can turn to use internal propellant.
The ion engine itself is not very sharp in what ions it uses. The use of mercury in those engines in Earth's atmosphere is banned because that metal is poisonous. But ion engines can use non-poisonous ions like hydrogen, nitrogen, or any other ionized atoms or molecules to give thrust to the vehicle.
https://interestingengineering.com/electric-drone-silent-ion-propulsion
https://innovationisonlyanimagination.blogspot.com/2022/05/the-silent-ventus-drone-is-silent-and.html
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