As a non Aeronautics expert I ask if non-fueled (electric?) vehicles which are minimally-noisy only science fiction or a real theoretical scientific concept aimed for close or very far future development?
I ask if there is any theoretical science that tries to describe how such a thing would be possible in the future...
Characteristics of such a vehicle:
- Some non-fueled thrusting; if electrical, than an enough powerful battery or enough powerful solar energy exploitation mechanism
- Bladlessness: No jet, no propellers/rotors or turbines
- Silent or almost silent: Not the regular noise. Something very very quiet - at least 75% of the noise will be air molecules rotating solely from the whole objects' motion, but not from the engine itself.
This flying object may or may not be able to fly both in earth's atmosphere and out of it.
Bob Lazar's flying saucers maybe?