How to properly design a VTOL/ADAV helicopter-plane?

[Remundo]

that's a good point.

I take this into account in my design.

The problem is that opening a parachute on the roof of a drone often cuts the ropes...

[Christophe]

In fact...Why can't a machine like the VTOl be equipped with the same reserve parachute as the microlights?

I think some are...

The problem is often evolve at low ground height...between 50 and 100 m...the ejection seat seems more appropriate to me...damn it's worth 3 drones a seat...

[Remundo]

The ejection seat is a heavy and expensive machine which also requires the top to be removed, it is not the world of microlights or even light aviation.

If one flies at such a low altitude, it must be possible to "catch up" with one's aircraft and land more or less well. However, we have already mentioned the concern of quadrotor drones which by design are uncontrollable when turning on 3 propellers.

The base jump record is 29m, however.



a parachute deployed by a small explosive should solve the problem of a low-altitude fall, or minima sufficiently limit the impact on the ground.

[Macro]

And airbags...

[Remundo]

why not, but it's dead weight on board.

For the weight of several airbags, we can probably make a parachute for the whole device, which will protect the device from large kinetic shocks, and the occupants at the same time.

[Ahmed]

Concerning the parachutes and the height necessary for their use, it should be noted that the first were used* during the war of 14 by the observers embarked under captive balloons and ideal targets for the adversary. The low height was then not an obstacle to this use because the parachute opened very quickly**. This was a disadvantage when it came to extending this measure to aviators: the speed of the aircraft associated with the suddenness of the opening could be fatal to its user; it was then that an extraction brake was added which allowed a more progressive deployment of the sail, but obviously required a much higher minimum height.

* This did not happen at the start of the conflict, but it was to put an end to the hecatomb of the observers.
** Due to the zero initial speed, the concern that will arise during ejections from an aircraft did not exist.

[Christophe]

And airbags...

Seems to me, but it's vague, that Gaston Lagaffe had developed one...

[Christophe]

Concerning the parachutes and the height necessary for their use, it should be noted that the first were used* during the war of 14 by the observers embarked under captive balloons and ideal targets for the adversary. The low height was then not an obstacle to this use because the parachute opened very quickly**. This was a disadvantage when it came to extending this measure to aviators: the speed of the aircraft associated with the suddenness of the opening could be fatal to its user; it was then that an extraction brake was added which allowed a more progressive deployment of the sail, but obviously required a much higher minimum height.

* This did not happen at the start of the conflict, but it was to put an end to the hecatomb of the observers.
** Due to the zero initial speed, the concern that will arise during ejections from an aircraft did not exist.

Are you sure of that ?

Because in 1912 the parachute wasn't quite perfect (poor guy...but why the hell didn't he try it with a dummy before? It's like those who design a innovative electric paramotor wouldn't do ground tests before... ):

After good in wartime it goes very quickly (see the differences in performance between the planes of 1912 and 1922...)

[Remundo]

it is a pity to risk his life so naively... An inert ballast of the weight of a man launched with the sails open would have easily demonstrated the aerodynamic vacuity of this harness...

[Christophe]

Not to risk it...to lose it...

Nevertheless, its design was not "very" far from current wingsuits...which fly (horizontally...you have to land with a parachute...)