This has happened to trikers too. The prop is nearly invisible. I believe it happened to the Flying Gringo once. What is amazing is the man in the above video should hav...
Short flight to the coast, tested all cameras vibrations. Super smooth E-Prop, the new engine mount hardware and dynamic prop balancing created almost vibration free environment.
Now this looks to be a very simple system. The pilot is still working on the development. Probably not a huge amount of thrust or extended time at high power but maybe a nice way to get up to supplement some natural ridge lift or thermal lift. Pretty cool.