I forwarded this article and series of pictures to my son whose engineering degree is in Aeronautical Engineering specializing in engine technology. What follows is his comments. "Cool, but how did he get it to do afterburner with a fixed nozzle. By definition, an engine that is capable of both afternurner and non-afterburner requires a variable nozzle, due to the change in mass flow and exit mach. The engine he used is from a helicopter which, first of all, is not even a turbojet or turbofan engine. The priamry function of a turboshaft engine like the one he used is to turn a shaft to power the rotor. I know he said that he modified it to provide rearward thrust, but it seems to me that the mechanics involved in designing the nozzle schedule to start an afterburn are more complex than what was shown in the pictures. I'm not necessarily saying it's a fake, because he does sound like he knows what he's talking about. But I'd be interested to know how he solved the variable nozzle problem."