Repulsorlift

Repulsorlift was a form of technology used for levitation of objects against the force of gravity. This was done through the use of traherism, an artificial force that could be projected artificially by repulsorlift technology using energy. This force could be used to push or pull against matter from a distance, and thus could be used to push against a planet's surface to allow a device to hover above the ground. Repulsorlifts were incredibly popular for use on vehicles, and were used for this purpose across the galaxy.

Mechanism
Traherism was conveyed by trahons, a form of artificial force carrying particle. These particles had a spin of 2, the same as the graviton. However, unlike the graviton, they had mass, and thus their range was not infinite. Lower mass trahons required more energy to produce, but this greatly extended their contact range. Trahons could be charged, with negatively charged particles projecting an attractive force, and positively charged particles projecting a repulsive force, the latter being used for repulsorlift technology. Trahons could be emitted using certain exotic substances, that could be exited through the use of energy.

In general, stronger traherism (and hence more energy) was required to lift larger objects, as well as to lift objects further away from the ground. More energy was also required to push against non solid materials, such as snow, water or air. Bodies with higher gravity also required the use of stronger repulsorlifts (greater traherism) to levitate objects on them.