But seriously folks. I would not be surprised if this is a scale o rama. Those tailfins look familiar, but I can't quite place them. Assuming that is a Gemini-ish capsule, those engines would be at least twice the size of the SR-71 engines. Presumable the jet gets up to mach 3 or 4 and then the tailcone blows off the rocket and the rocket takes off. However, that capsule is certainly not really going to do well at those speeds.