The hyperatomic motor was developed in the Ancient period and the theory behind it was nearly lost in the Spacer period. It was only refined once more in the period of colonisation and Empire.
The theory of hyperatomics states that, in a hyperatomic field, an object basically leaves this Universe, entering Universe H1 in the field G1, where all atoms are now tachyonic in character. Naturally, the field starts to ebb in this wild otherspace and, as it does so, the object reenters realspace. As the object had infinite field in H1, it has moved x light years in relation to our own Universe, all in relation to the time spent in H1.
The principle of the hyperatomic motor is to turn itself off, in a small moment of time, and without self destruction due to the colossal energies involved, often in the order of 1,000 gigawatts.
Let L = light years, x = light years moved in realspace and t = time in femtoseconds then:
for any ship in hyperspace.
Hyperatomic Motivators work on the forming of a singularity encapsulating the ship and then forming another that encapsulates some realspace in H1. A double-exchange takes place, the ship Jumps and the portion of realspace returns where the ship was, with the characteristic Cherenkov flash associated with hyperspatial travel.
The motivator also causes the "inside-outness" feeling associated with hyperspatial travel due to the realspace singularity swap. Late (post 1050 FE) model starships, particularly Gravitically-powered vessels, endure very little harshness of jumps due to their Galactic inertia. (See FS Far Star)