Fat Wings

A discussion restricted to the topic of hang gliding.
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The Oz Report
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Fat Wings

Post by The Oz Report »

<div id="1599711854"><i>Are those little vortex generators (seem to be in the wrong place)?</i><br><p><a target="_blank" href="https://robbreport.com/motors/aviation/ ... Bfg8"><img border="0" src="../pub/images/Lead-flyingvimageiii-276996.jpg" width="640" height="360" style="width:auto;height:auto;max-width:100%"></a></p><p class="BN">A scaled version of the V-Wing made its first flight, showing that alternative designs could become long-distance aircraft of the future.</p><p class="BN">A scale model of the “Flying-V”, an experimental aircraft design with huge wings, took flight recently in Germany. The blended-wing aircraft concept is a project by Delft Technical University (TU Delft) in the Netherlands, with financial support by KLM Airlines. It was recently flown from a German airbase, with the support of a team from Airbus.</p><p class="BN">The Flying-V was designed as a fuel-efficient, long-range aircraft in which the passenger seating, fuel tanks and baggage hold are built into the wings. Research shows that the unusual design stands to gain up to 20 percent better fuel efficiency than an Airbus A350 jetliner, considered today's most advanced design. It's also about 15 percent more aerodynamically efficient than conventional aircraft. At full scale, the Flying-V would seat 314 passengers in two classes.</p></div>
Brucemorrow
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Post by Brucemorrow »

They are windows.
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Davis
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Post by Davis »

Oh, gee, really.
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CloudHopper
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Post by CloudHopper »

Word has it that they are high tech Windows made of microsoft material which will excel as long as they are replaced every year or 2 with the next version.
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Harry Martin
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Post by Harry Martin »

Still waiting for the future.

https://www.youtube.com/watch?v=ub6U9CL0K_A
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KaiMartin
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Post by KaiMartin »

Brucemorrow wrote:They are windows.
It is a computer generated image, anyway.
Here is an image of the actual scale model:
Image
The layout is a lot more unconventional than the view of the cgi suggests. Its planform is a rather sharp V.
Kai-Martin Knaak
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UnTuckable
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Post by UnTuckable »

One of the problems with flying wings for human cargo, is the further away from the fore to aft center line (roll axis) that the passenger seating is, the more unpleasant it is for the passenger during banking turns, rolls and/or turbulence. Ok for slow slow turns and smooth air, or carry plenty of barf bags. Or they could charge extra for the 'roller coaster' seats.
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KaiMartin
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Post by KaiMartin »

UnTuckable wrote:One of the problems with flying wings for human cargo, is the further away from the fore to aft center line (roll axis) that the passenger seating is, the more unpleasant it is for the passenger during banking turns, rolls and/or turbulence. Ok for slow slow turns and smooth air, or carry plenty of barf bags. Or they could charge extra for the 'roller coaster' seats.
The video of the test flight mentions sensitivity to dutch rolls. This kind of missbehavior is already challenging to the passengers in regular airliner. I imagine, it would be extra bad in the back end of the flying V.
If I recall correctly, there is already an dutch roll dampener active by default in current Boings or Airbuses. So the engineers may see this as a challenge rather than as a road block.

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KaiMartin
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Dutch roll = wing-over ?

Post by KaiMartin »

So I was watching airliner commanders explaining their reaction to the Dutch roll. It made me wonder, whether hang gliders also show this kind of behavior. After all, our wings are strongly swept back , too.
Could it be, that the movement we call "wing over" is our version of the Dutch roll?

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UnTuckable
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Post by UnTuckable »

Any banking would cause the passengers on one side to experience less than 1G. Unless the aircraft climbs at the same time to offset it. They could do the turns slowly with little banking, but sudden rolls in turbulence are going to be fun for those in the outer seats.