Reposting to explore more explanations

This craft was spotted by dozens of people in 2021, All the official gov bodies, atc, airforce, defense research, denined any knowledge of it.

The sound was like fainter than helicopter, but deep and audible, silent than a helicopter, , flew for decent 15mins in neighborhood .

My explanation camouflaged new tech, blip type aircraft. It was fuxking invisible to normal eyes.