Here's how the motors will be mounted on the dog-bone mounting bracket. Practically this forms a demountable bogey that can be swapped out for rapid turnarounds in the event of breakage or failure.
In my experience drone-builders don't really get designing for personal air vehicles and not least because they've not flown their ass in a variety of machines as I've done over the course of some fifteen thousand hours.
One consideration for instance that rates this arrangement over co-axial propellers is that the brackets will be fitted with that left-most side nearest the airframe in order that the associated propeller is pitched clear of the occupant.
In a risk assessment scenario I've conducted, two people go flying in these suspended chairs in the Grand Canyon and one points to an interesting feature up above, loses a hand and bleeds out.
We need to eliminate each risk step-by-step while acknowledging flying is inherently risky. The reason people duck when boarding helicopters is that those not doing so do occasionally get their heads chopped off. Or die walking into tail-rotors or propellers on aeroplanes, or sucked into jet-engines.
That's why most of this type of work takes place beyond the shores of the UK, where what most needs saving from peril is the index-linked pensions of those overseeing its evolution. I should have gone to the US years ago, but it's too late now...
Because there are no rules for building electrified personal air vehicles and the reason we're working with parts off the shelf is that this is what happens at the birth of each technology.
I've seen the original steam locomotives with parts sealed with the leather and grease from cattle, and cars built from horse-drawn carriages. My old man was a telephone engineer for forty years and when I saw the first electrical computers being operated at Bletchley Park ~ where Enigma was cracked ~ I recognised the parts straightway.
From the analogue telephone exchanges I wandered as a child.
