Who said I believed these would work? The point is, he was actively trying to make these work, and probably could have with funding, and more precise mechining.
About the wall of light, It was a theoretical invention, where electromagnetic waves would be altered in different patterns and frequencies. That's all i know, look it up yourself.
>Many times sounds like an exaggeration. So what efficiency did his turbine run at compared to an efficient modern turbine?
Ok, it was an exaggeration. While today's turbines run at about 80-98% efficiency, tesla's patented turbine could run exceeding 95%. Still amazing for being designed around 1913. And with today's technology, it could certainly reach higher efficiencies.
>Or maybe the idea was never developed or never would have worked. Conspiracy?
Again, missing the point. He proposed these machines to have a certain shape of a saucer. The kind that were reported to have been seen, also coinidentally, after 1880, when he invented it. Why would these machines show up only now, if they were really aliens? These are military machines that were developed up until his death. Remember Roswell? A flying saucer of his design crashed only 4 years after his death. Hmm.