Repulsorjet
A repulsorjet, also known as a microrepulsor, was a miniaturized repulsorlift engine used in a variety of small items, as well as in maneuvering thrusters by ships in atmosphere.
The Rodian throwing razor was one such item, using a miniaturized engine to instill a "boomerang recall" feature into the weapon.
Remotes such as the Marksman-H combat remote utilized small repulsorjets to float, and small camera droids also utilized this technology.
