The Flying Hexacopter UAV drone to 1 passenger and less than 10 000 €! DIY!

[Christophe]

If the mannequin was there to simulate the weight of a passenger, OK But there, it does not weigh much and only serves to look pretty on the image.
In the end, from what I can deduce from the video, it's just a big drone with enough room to accommodate a seated human, but not the push necessary to make it take off beyond 20cm.

Some details (have been in electric aeronautical propulsion for 3 years ...)

1) 20 cm, 20m or 200m the necessary thrust is the same ... The thrust of a drone is used to compensate the PTV (total flying weight) + the possible rate of climb + the differential corrections of pitch / yaw / roll

Power = Force * Speed ​​...

If the machine weighs 200 kg in PTV and it wants to climb to 1 m / s it must transmit to the air 2000W which roughly corresponds to a drone at 8 to 10 000W real (because the propulsive efficiency at low speed are mediocre and there is no carrier wing ...) ... or 10W in addition to the power required for stabilized flight.

The power in flight stabilized in 1st approach can be obtained by dividing the PTV in grams by 6-7 by taking a propulsive efficiency of 6-7 g / W ... Thus a drone of 200 kg will need 200 / 000 to 6 = 28 to 000 W just to maintain its level ...

Total for this drone: 40 to 50 kW ...

As long as the air density is constant, the necessary power is also constant ... So provided that the machine has sufficient autonomy to climb so high that it rises to 20 cm or 200 m it's the same!

However the fall will not be the same

2) The motors and controllers of the video correspond well, visually, to 40-50 kW of power (see a little more) ... hold that sticks with my approximation ...

3) The best current batteries are at 200Wh / kg ... so to supply 50 kW for 1 hour you need 50 / 000 = 200 kg of battery ... or 250 kg for 42 minutes ... 10 kg for 84 minutes. .etc., etc...

We fall back well on the approximately 200 kg of PTV: 42 to 84 kg of battery + 80 kg of pilot + 30 to 60 kg of machine (structure without battery)

So the autonomy of this drone will necessarily be very reduced (like all drones without a wing ... but some engineers have still not integrated this visibly ...) and will strongly depend on PTV ...

If the machine does not exceed 20 cm in the video when there is a man in it it is, I think, just for safety and because the project is still in development because the push it can have it (but not long time...)

The bathtub of the 1st message on this subject, exceeded 20 cm ... and the project had to cost 10 times cheaper!

In short, so I think it's more about security than technology!

[Christophe]

Would this machine be able to climb high enough to check that the ground is flat?

No interest, the buzz made dishesh! Oops, I'm mean!

[Petrus]

1) 20 cm, 20m or 200m the necessary thrust is the same ...

Uh no :

Ground interference significantly reduces the power level requested

source: https://fr.wikipedia.org/wiki/Effet_de_sol

[Exnihiloest]

No matter the center of gravity it's not a plane, it's a hexacopter!

[b] It is not possible this tendency to grumble systematically and to be also blocked psychologically and especially to see dishonesty everywhere! ...
It becomes frankly heavy...

It becomes heavy from your point of view because what you usually defend is consensual in relation to the theme of the site. But when you show the unusual, for example that natural organic is not a panacea, that glyphosate is not harmful, that there are good GMOs or that anthropogenic warming is manipulated, the "heavy" reactions of the "psychologically blocked" seeing "dishonesty everywhere", you have them every time; welcome to the club.
So continue to present us with things that are a little exotic or contrary to common sense, and you will see, the "heavy" reactions you will get used to.
Besides, it's interesting. I had dreamed of this kind of thing for a long time, a simple "drone" capable of lifting a human, and accessible to the handyman, without suspecting that it was already possible with the means at hand if I may say so.
I appreciated your technical analysis of the system, the energy balance which shows us the feasibility is perfectly clear.

[Christophe]

1) 20 cm, 20m or 200m the necessary thrust is the same ...

Uh no :

Ground interference significantly reduces the power level requested

source: https://fr.wikipedia.org/wiki/Effet_de_sol

Ok at 20 cm (it is still mounted a little more than that eh) we certainly take advantage of the Mea Culpa ground effect still it must be quantified ... The wiki link says that there is for rotary wings, therefore a priori there are also for propellers:

“Close to the ground, a hovering helicopter benefits from ground effect due to the blast of its main rotor. The hovering performance of a helicopter is therefore indicated according to its proximity to the ground: In the Effect of Ground (DES) or Non-Effect of Ground (HES). "

But there is nothing quantitative ... so how much would it be in your opinion?

Either it is certain that the power of the engines of this drone is sufficient to make a man fly much higher than 20 cm!
If you are not convinced, compare them visually with the bathtub of 2018:

The unknown is the capacity of the batteries ...

[Petrus]

I'm not an aeronautical specialist, so for the calculations I don't have the knowledge, sorry.
I just know the basics, I got interested in drones before it became mainstream, I wanted to make one but I lost interest, anyway, it doesn't cost much today. I still have an X-UFO quadcopter, it must be one of the first quadcopters to be mass produced, the flight is stabilized by a mechanical gyroscope and the battery is in NI-MH technology, it had a ridiculous autonomy, I would have to convert it to li-po and gyro MEMS one of these 4, it could be nice.