A repulsor coil was an integral component in the building of a repulsorlift engine. The repulsor coil was the component that produced the anti-gravitational field. The repulsor coil used a radioactive outburst to excite the electrons on the ground, disrupting the polarized magnetic thereby manipulating gravity. The effect of this gravity manipulation can be modified a great deal. Repulsor technology can therefore be utilized in everything from capital ships to door systems.