Last time people concluded that 'I proved the law of conservation of energy and momentum wrong by my invention'......but the reality is strictly opposite. If this invention DOES NOT work THEN then 2 laws are wrong. This invention follows all rules and regulation governed by the physics book. Notice that "a body cannot be propelled without interaction of external mass" is NOT any law. As wiki states - "The law of conservation of momentum means that in order for a propulsion method to change the momentum of a space craft it must change the momentum of something else as well." That something else IS there...there's an independently moving mass inside which propels the thing. This is how it works - All this is considering elastic collisions. Suppose a light ball collides with a heavy body...suppose a boat. Depending on the difference between masses of the ball and boat, the ball will recoil. If the boat is heavy, the the ball will recoil more...the reason for this is the law of conservation of K.E working in conjunction to law of conservation of momentum. The 2 are not the same thing...that's the problem. When the ball collides with the boat, it delivers the same amount of impulse that was delivered to it, but not the energy, since K.E has an exponential relationship to velocity and leaner to mass while momentum is leaner to both, even though the rated impulse will be delivered to the boat through the ball, all the energy possessed by the ball will not be derived to the boat cause the boat has gained momentum by virtue of mass...i.e less velocity. Ultimately very less K.E. The remaining energy will be transferred to the ball and seen as the recoil. Now what I've done is for example...I'm on the boat and I've thrown the ball in the 'negative' direction...this will initially propel the boat in the positive direction. If this ball collides with the boat, the boat will attain a velocity in the negative direction and it (the ball) will recoil. If it again hits the boat after recoil the boat will now start moving in the positive direction...this will continue forever and there will be no net propulsion and the boat will simply resonate between 2 points. Since I've considered elastic collisions here the ball wont simply stop cause of 'thermal motion'. Suppose the ball after recoil is moving to the positive direction (and the boat, consequently to the negative), assuming the ball has iron inside it, if I pull the ball (trying to stop it relative to the boat) through a solenoid and stop the solenoid after the ball has stopped, this will be different from a collision. This time, all K.E possessed by the ball will be will be used to propel the boat in the positive direction..........so instead of all the momentum being transferred from the ball to the boat, all the energy gets transferred. For the same reason this impulse given to the boat through this magnet will be more than the collision of the ball to the boat or the impulse given by me to the boat when I threw the ball resulting a net propulsion in one direction. If things simply stop, the law of conservation of energy will be violated...so it has to get propelled. Now as wiki states "The law of conservation of momentum means that in order for a propulsion method to change the momentum of a space craft it must change the momentum of something else as well." The momentum of this ball is changing.