Is this a known technology used on some aircraft?
Our reading convinces us that some of our military craft are either totally UFO types with virtually all such capabilities.
Reportedly there appear to be military craft with dual propulsion systems--to behave conventionally and very UFO like with the seeming flip of a switch.
There are other reports where the UFO components result in the craft having ~90% left gravity than it would have with such systems switched off--allowing a relatively small assist by conventional means to still result in a very maneuverable craft.