Quote from: K-Dog on Nov 29, 2024, 11:52 AMI can't watch the video, I tried.  Looking at that thing made one of my brain wiggles do some unconscious math which generated a gut reaction of strong revulsion.  Having to do with battery energy density considerations and energy flight requirements. 

Too bad.  There's other stuff besides the obvious energy density problem that would at least raise an eyebrow, if not make you gag.

The vid begins with the "Blackbird" leaving out of the Garage of a suburban house.  The designers didn't even put it on wheels so you could taxi out of the garage to open space and then lift off.

Now, can you imagine the backwash of air bouncing off the ground underneath the machine then further bouncing off the walls of the garage? Anything not bolted down inside the garage would be flying around like pieces of roof flying around in a hurricane or tornado.  The vehicle itself would be buffeted by the air blowing around in all sorts of crazy directions.

Basically, it is pictured as taking off like an imaginary anti-grav type shuttle from sci-fi movies.  The rotors are pictured working like Iron Man style Repulsor devices that generate propulsion without action-reaction in violation of Newton's 2nd Law.  Even if it flies, there's just no way you could take off from inside an enclosed garage like that.

Besides that, the complexity of those rotors with the pivoting airfoils is astounding.  Each of those little winglets would need its own little servo-motor to change its angle of attack because they're all spinninbg at high speed and only connected at the hub of the whole spinning assembly.  How long before one of them fails?  If just one of those blades is at the wrong angle, the vibration would about instantly cause the whole propeller assembly to break itself apart.

I would find the whole design more believable if the designers dropped hydrogen fueled mini jet engines for those rotor thrusters.  As I mentioned, it's suspicious that they don't even demonstrate a scale model.  You can make anything magically fly in 3D virtual space, the sci-fi movie industry has been doing that since Buck Rogers.  Building real world VTOL aircraft that can hover is a tad more difficult without the magic of anti-gravity and/or disregarding Newton's laws of motion.

RE