Inertia and travel by the space

And is for jet of explosion propulsion, an apparatus without engineering and without a mechanical propeller  but with physics for the explosion and for the fuselage, and it’s also work for rockets, and it’s based in the inertia, so for the travel in the air and in the space, by the inertia you only would need a perfect fuselage and make the propulsion by an explosion and something else the launch base (base de lançamento), and you would travel with no engineering or without fuel, the inertia would keep the air-plane in the air, only the explosion of the moment of the take-off is the force (phisics concept) that would be need of energy to the travel, if you get a perfect fly the velocity would keep for inertia, because this the explosion would be perfect because the velocity is of the launch, the airplane (jet) and rocket, would never accelerated  could would slow down but not accelerate, the inertia would keep the airplane or the rocket travelling for ever, so in the jet you could circulate the Earth for ever the explosion only would influence in the velocity and not in the duration of flight, the inertia would make it for ever, the problem that one time that the fly wasn’t perfect the airplane would be out of inertia and would slow-down, so is the imperfection that take it out of inertia and out of the inertia the airplane would slow-down, but the theory is so good that when the airplane would slow-down gradually the airplane would lost height slowly so you would not fall of one moment for other the airplane would land with some security, but of course the pilot had to be very intelligent. So is so impossible a person at 500 or 1000 2000 years ago put a jet for propulsion in the air? The only thing that difficult is find is the explosives for the propulsion. And of course don’t have to be a big explosion is a relatively small explosion, and of course if the fuselage explode the airplane would not decollate, would be damage, so don’t need a big explosion, if with the quantity of explosion the airplane don’t take-off maybe was because the fuselage wasn’t perfect, or the launch base wasn’t good and wasn’t a problem of propulsion. Rute Bezerra de Menezes Gondim