TAV (Transatmospheric Vehicle) and its use in space force

When we are thinking about the space flight, the normal turbine jet can rise to the LEO (Low Earth Orbiter) or ballistic flight trajectory, if that plane has the capacity to rise straight upwards, and the inlets of the jet engine must be closed by hatches. Then in the turbine must be injected oxygen and the aircraft would rise outside of Earth atmosphere. The question is that: could the motor has enough power to push the aircraft through the loose air, where the wings cannot hold up the aircraft. So by using this technology, the normal looking jet fighter can make at least the ballistic jump outside the atmosphere, and then return to the ground.

The thing, in that case, is that when the aircraft returns, the speed of it would rise at a very high level, what makes difficult to create the heat shield for that plane. But the extensive speed would give the ammunition, what is launched from those aircraft extreme high muzzle velocity. That would melt the ammunition, and if it hits to something, it will melt even the large target immediately.

This kind of aircraft would be useful in the missions, which are meant for HCM (Hypersonic Cruise Missile).  But TAV has more capacity to operate. The speed of the landing aircraft will be enormous if it will compile with the speed of normal aircraft, and then if it would use normal cannons or rockets, the speed of ammunition would rise in the speed of Mach 10-20. The speed of the ammunition loads the projectile very high impact energy and the energy is transforming heat.

That would make famous GAU-8 "Avenger" cannon seem like legume tube. The laws of physics are simple, the movement of the aircraft will accelerate the ammunition with the same level, how the aircraft moves in the air. If the cannon round hits the target with the speed of Mach 15, that will make the heat, what will melt even the big size target. And it can cause bad damages or even sink the target what has the size of aircraft carriers. That kind of systems might be installed in the next generation aircraft, but the F-15 can push itself upwards by using the thrust of the motors.