That's easily solved - retractable skids much like on a helicopter that are activated by air pistons that also act as shock absorbers to cushion the craft as it crash lands from 15ft off the ground. 15ft is a survivable height to hit the ground from... with the skids and maybe a cushioned/air ride seat, the most one would feel is a hard hit, but nothing to break your back. Forward speed though, that's a lot harder to solve.
That being said though, since it is a dual-fan design, i hope the transmission is setup so if one fan motor goes, the other one can operate bot fans, albeit at a slower speed, enough to slow the craft down to a safe crash speed (an oxymoron in itself, but it's the correct term lol)... also would wanna see the lefting/towing capacity and how this would also be accomplished.
But the geek in me is having a geekgasm right now. F*** yeah human ingenuity
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Both this and the Martin Jetpack linked to above have shrouded fans, with the shroud being a functional airfoil (NACA duct) for thrust augmentation.
Looks like the hover-bike has some catching up to do as apparently the Martin Jetpack has been trialled at an altitude of 5,000ft MSL!
The bike could probably use more power but this proof of concept has the control system placed in greater priority. These prototypes probably will grow bigger over time on their own but the main challenge now is create a functional steering and stability control system I guess. Too big a performance envelope and no control & safety would end in disaster just like a lot of ambitious (but rubbish) Cold War projects.
I could see a future model being capable of high speed forward flight on stub-wings to offload the rotors allowing faster cruise and longer ranges creating a proper one-man personal courier vehicle.
Still a long way to go before a practical use can be found but along with things like visual stealth, powered exoskeletons and mechanical walkers, are the awesome stuff of this Century to be enjoyed by future generations
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