PRODUCING A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR (from combustion products F02K)

Description

F03H covers unconventional and residual propulsion systems that generate reactive thrust through mechanisms not classified elsewhere in the F03 hierarchy. This includes electromagnetic propulsion, ion drives, plasma thrusters, and other advanced propulsion concepts that do not rely on conventional jet engines, rockets, or fluid-dynamic principles already addressed in other F03 subclasses. The classification serves as a catch-all for emerging and non-traditional reactive propulsion technologies that do not fit into established mechanical or thermal propulsion categories.