Shenyang next gen combat aircraft thread

by78

by78

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on the fluttering characteristics of wings with all-moving wingtips.

Abstract: The performance requirements of modern fighters meet multiple targets such as high speed, high mobility, stealth, lightweight and so on. The aircraft with a tailless flying wing configuration has the advantages of high aerodynamic efficiency, good mobility, low detectability, and flying integration. Such configuration adopts a structural design with wing and body fusion, multi-control surface and all-moving wing tip. The innovative structure of the wing tip highlights its aeroelasticity problem, in which the coupling effect between the structure of wing tip and the control surface makes the flutter behavior particularly prominent. This paper adopted the linear flutter method and the mode tracking method to study the flutter problem of all-moving wing tip. According to the study, the flutter coupling has three types for the aircraft with a tailless flying wing configuration: coupling between the first symmetrical bending of wing and the symmetric rotation of all-moving wing tip (symmetrical couple), coupling between the first anti-symmetrical bending of wing and the anti-symmetric rotation of all-moving wing tip (antisymmetric couple) and the fuselage mode in flutter. It is found that the flutter speed of the antisymmetric coupling type is lower than that of the symmetric coupling type. From the flutter result, the coupling flutter speed of the fuselage and wing is higher than that of the former two, and the coupling speed of the fuselage and the all-moving wing tip is lower than that of the former two. The main structural factors affecting the symmetric coupled flutter are wing bending stiffness and rotational stiffness of the all-moving tip, while the main structural factors affecting the antisymmetric coupled flutter are wing bending stiffness, fuselage rotational inertia and rotational stiffness of the all-moving tip. The all-moving wing tip structure is the internal factor that makes the tailless flying wing prone to flutter.
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Tomboy

Tomboy

Junior Member
Registered Member
Is it possible for SAC to actually have 2 totally different aircrafts flying?ezgif-20462f78cfc74e.jpgChina_Second_Stealth_Jet_1-860x484.jpg
These two pictures seemingly show the same aircraft, but this picture below seems like a completely new aircraft since both of the pictures above show planes with no visible horizontal stabilizer yet this one clearly has onesac-fig-3.jpg
Or maybe this last picture might just be a fake CGI'd picture?
 
Nx4eu

Nx4eu

Junior Member
Registered Member
AndrewJ said:
Very nice CG & speculations.

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I hate it when people give nicknames to a fighter which we don't even have a number code. Seriously 'Shadow' ?! It's not even being close to real nicknames often given to Chinese fighters, AND it doesn't even follow NATO designation standard which follows a letter F first.

This Title Alone already makes me believe this video is hot garbage. We also pretty much know that there are NO folding V tail present on this aircraft, so the thumbnail again already makes me think this video is hot garbage

Then I hear the AI voiceover and now I know definitively that this video is... drum roll please. Hot garbage.
I wouldn't call this Video "Very good" In any sense of the word. This is just pure SLOP

I highly recommend not posting videos from Random Youtube Channels
 
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