The free energy to which many websites refer (namely an energy extracted from nothing) is a sham and a fantasy.
Following the death in 1947 of Hans Coler, the construction of this aircraft could not be completed. However, positive results could be obtained on a smaller device, whose structure and elements, combining magnets, induction coils and capacitors, recall those used for radio antennas.
Oddly enough, the advent of its miraculous machines is always stopped by the death of their supposed designer, as if no scientist was able to take over, a shame!
This is again a flagship thesis of conspiracy: that of absolute genius, in short a man with a lead of several decades, see several centuries on the knowledge of the moment.
In reality, no scientist - however brilliant - can really anticipate the global knowledge of the moment in such an important way.
Besides, when a discovery is made it takes a short time (case of the A bomb for example) for other scientists to make the same discovery soon after, see at the same time.
Imagine, that we can with this type of device, capture the energy lost in the atmosphere from electromagnetic waves produced by radio, TV and mobile phone transmitters (which according to some would constitute electromagnetic pollution responsible for health problems), to provide free and accessible electricity to all.
Very little compared to the amount of solar energy received by the earth.
Free energy accessible to all is synonymous with destruction accessible to all, given the trend of the moment I do not give much for the survival of humanity in such a case.