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He could fly to five metres attached to a safety line on a ten-metre tower, or a crane. A simple auto-descender would do fine.

My impression watching this guy's videos when they have hit the news over the past few months has been that, for whatever reason, it skims the ground and can't ascend. If he wants to disprove that, it should be possible to rig up a safe test.

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As far as I can tell, they're working on a garage budget. A ten meter tower and crane is non-trivial to rent and setup.

No reason to disprove something that is disprovable with a basic understanding of basic physics and aerodynamics.

I expect the big challenge with a device like this is NOT ascending too high where you'd be at risk of breaking a leg or thousands of dollars worth of red-hot jet turbine. This isn't a drone, it's a flying person.

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