The Horten Plane is a new kind of airplane denominated Flying Wing. It appears in all Covert Front Series games. In the game, it is called "Airplane of Unknown Construction" by the Intelligence Agency General Headquarters. It was designed by Karl von Toten. It was probably designed by the Imagination Realisator. You can see it being developed in the Movie Reel 3.
Our Universe Edit
It looks like an airplane in real life, Mateusz Skutnik once painted a similar plane, which is now deleted from the internet. It is called Horten HO-229 and was made by Nazi German at the Second World War to bomb the United States in the project "Amerika Bomber".