Shiftdrive

In dimensional physics, a shiftdrive is a type of non-Einstenian drive capable of transporting ordinary matter from realspace to shiftspace and vice versa. Shiftdrives require huge amounts of power to operate. Combined with their size, most shiftdrives are limited to voidcraft classifications above fifty metres.

History
insert history here if I remember to do so

Principle of Operation
The essential working principle of a shiftdrive is that it builds microscale gravity fields around a selected point of space-time before using a high-yield energy burst to simultaeneously collapse these fields, piercing space-time and pulling all ordinary matter in a certain radius through to the corresponding point in the counterpart dimension.

Upon primary calibration, the device automatically creates a quantum entangled instance of itself inside shiftspace, which is used as the reference point in shiftspace for which the ordinary matter will be transported. These instances are superimposed over each other, yet do not interact if not actively conducting a shiftspace flip. This is because when in one dimension, the shiftdrive instance corresponding to that dimension is considered "in-phase", while its counterpart is "out-of-phase". This appears to be a natural product of the sub-shifted spatial medium, with the purpose of preventing the destruction that two identical objects attempting to occupy the same space would cause.

The default instance of a shiftdrives always appears to be its realspace instance, likely because realspace is where the device was created and calibrated. Thus, if a shiftdrive suffers debilitating damage, the quantum entanglement between the shiftspace and realspace instances will collapse, rendering the shiftdrive useless, or if it is currently in shiftspace, forcibly ejecting it and all ordinary matter in a certain radius.

Shiftspace ejection causes immense damage to all matter ejected, likely due to the objects being violently ripped through space-time instead of a comparatively gentle and prepared flip.