Pace - scimming through your posts I think you may have a misunderstanding as to what kinetic energy is. Kinetic energy is a form of energy that an object has by reason of its motion. The kind of motion may be translation (motion along a path from one place to another), rotation about an axis, vibration, or any combination of motions. The total kinetic energy of a body or system is equal to the sum of the kinetic energies resulting from each type of motion. The kinetic energy of an object depends on its mass and velocity. For instance, the amount of kinetic energy KE of an object in translational motion is equal to one-half the product of its mass m and the square of its velocity v, or KE = 1/2mv^2.
Bob Hoover looping his twin using nothing but Kinetic energy
leaves cruise thrust set and descends his aircraft will accelerate due to Kinetic energy plus his thrust
Both these statements are incorrect. Hoover maintains the kinetic energy state of his aircraft (speed is the only thing he has control over since its mass is fixed) by using his potential energy, which is the altitude available to him. When Wiz sticks the nose of his 777 down it accelerates because he is using up some of the potential energy available to him by virtue of his altitude. He is trading altitude to increase the kinetic energy of his aircraft (ie speed), but in doing so he is losing potential energy (height).