Torodial propeller : This Genius Propeller Will Change Transport Forever
A gas turbine engine designed to take-off and land as a conventional turbofan engine at subsonic speeds and accelerate to supersonic speeds during flight by converting into a hybrid turbojet and ramjet engine. This is achieved by introducing an afterburner in the bypass duct of the engine and by retracting the bypass fan backward into a cylinder. This operation is carried out before the aircraft enters the transonic regime, at any stage below Mach 1. At supersonic speed, the shock wave is deflected through a needle cone that is projected out of the nose of the engine in order to prevent the intake air from being choked.
An engine whereby an afterburner is introduced in the bypass duct of a turbofan engine in order to combust the bypass air and the bypass fan is disengaged from the core shaft and is retracted into a cylinder during any stage of flight for the purpose of accelerating from subsonic speed to supersonic speed along with a shock deflector needle attached to the hub of the engine and the mechanism of fan retraction is reversed and the afterburner is switched off when the engine needs to fly at subsonic speed again.