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

[Christophe]

Shall we go Remundo?

Info: http://inter.action.free.fr/docs/02-avis-general.pdf

[Remundo]

Saint Yan, it's not far from my home, it's worth going there.

an exceptional reduction of 180 € is granted if the registration is done
during aeronautical gatherings (RSA, ULM Blois). She is still from
100 € if the registration reaches us before April 1, 2023 (and 50 € if it
arrives before May 1).

kézaco the RSA, ULM Blois?

probably this: https://www.rsafrance.com/index.php/age ... el-a-blois

[Christophe]

Yes, these salon discounts are weird...

I will contact Michel Kieffer again, he has been in the association for a long time...

[Remundo]

Lift, Drag and Wing Smoothness

Also, there is a tendency to lengthen the wing, to reduce the chord at the wing tip[/b], but also to install devices there to reduce these parasitic vortices such as fins / winglets.

Found on facebook, this concept that doesn't skimp on winglets

Atea_VTOL_ascendant_flight_technologies.png (332.91 KiB) Viewed 116 times

Which in my opinion mixes the good and the less good.

I find that the layout of the wings is interesting, especially at the front where the "duck" fins are very developed to the point of forming almost a normal-sized wing.

The aerodynamics of the fuselage in airplane mode seem to be of good quality.

On the other hand, the installation of the propellers in the wings is harmful; this probably decreases lift in airplane mode in addition to generating turbulence/drag on the wings.

If you have money, here it collects by tens of millions €..., very proud of their aerodynamically questionable project at first glance.

[Christophe]

Not even made and already expired: there are double winglets

I find it hard to believe in the stability and performance of pierced wings...

21 Million, 245 promises of sale based on a prototype that never flew (at least not in the air…)…here is the start-up nation of big mouths that is banding… Macron…

[Christophe]

I found this Remundo in a professional equipment magazine, it's in your corner apparently: Fleasy X8ed in flight...virtual!

I didn't know that we could certify on the basis of scale models!!

X8ed.jpg (350.8 KiB) Viewed 60 times

This allowed me to discover: https://hionos.com/ which looks interesting!

[Remundo]

yeah the shape of the wings inspires. They are looped, which reduces the marginal vortices at the tips of conventional wings.

This contraption on the other hand is a little strange, it is an "octocopter" whose wing seems to tilt.

But it is above all by its propulsion which in my opinion is a big pipe...

I quote "a turbocharged high temperature fuel cell"...

Not content with this gas plant, the designers added a tank of hydrogen... liquid, that is to say close to absolute zero...

I bow !

[Christophe]

Apparently it goes to the EASA!