A friend of mine posted this reference to the World Economic Forum (WEF) today on facebook. WEF wrote a great story about a new plane designed by MIT. The airplane uses no moving parts but ionic propulsion. Therefore the plane is very silent. I would love to write words and words about it, but the WEF was much better at it, and has a video that explains everything very well.
Please make this happen very soon. The planet would become much much much more silent by such a plane or drone.
Silence Diary 