Deano87 Posted December 21, 2019 Share Posted December 21, 2019 Hey all. I've just been flying with wingtip mounted AMRAAMs and I noticed that the wingtips are flexing in the incorrect direction during roll. In fact the reverse of what they should be. If we look at the jet in the picture above you can see that the jet is initiating a right roll. Notice the following things, on the upgoing wingtip (left wingtip) the leading edge is being bent down, on the downgoing wingtip the (right wingtip) the leading edge is being bent up. This makes sense from a physics point of view because the AMRAAM protrudes a long way beyond the wingtips and as such the centre of mass of the missile is near or even beyond the leading edge of the wing and and will naturally bend the leading edge in resistance to the roll direction. If you look at the tip bending in DCS with AMRAAMs fitted (can't comment on empty or Aim-9) its going the opposite way from above and to me doesn't really make much sense. Thoughts? I can try and get some screenshots from DCS Tomorrow. Proud owner of: PointCTRL VR : Finger Trackers for VR -- Real Simulator : FSSB R3L Force Sensing Stick. -- Deltasim : Force Sensor WH Slew Upgrade -- Mach3Ti Ring : Real Flown Mach 3 SR-71 Titanium, made into an amazing ring. My Fathers Aviation Memoirs: 50 Years of Flying Fun - From Hunter to Spitfire and back again. Link to comment Share on other sites More sharing options...
JTFF - Raph Posted December 21, 2019 Share Posted December 21, 2019 +1 Here as you can see on the track, on the first left rolls, it's inverted, after that I do some "yoyo" with negative G's and everything is okay. Wing flex issue.trk Modules: Nevada, Persian Gulf, Syria, Normandie, FC3, CA, Super Carrier, A-10C, A-10C II, F/A-18C, F-16 C, F-14 B, SA342, and WWII stuff. Hardware: I7 8700K, Geforce GTX 1080Ti 11Go OC, 32Gb RAM, screen resolution 2K Devices: Hotas Warthog, Cougar MFDs, Saitek rudder pedals, Track IR My squadron: http://jtff.fr/SITE/ Link to comment Share on other sites More sharing options...
bkthunder Posted December 28, 2019 Share Posted December 28, 2019 Yeah that's true! Nice find! Windows 10 - Intel i7 7700K 4.2 Ghz (no OC) - Asus Strix GTX 1080 8Gb - 16GB DDR4 (3000 MHz) - SSD 500GB + WD Black FZEX 1TB 6Gb/s Link to comment Share on other sites More sharing options...
AdmiralQuality Posted December 29, 2019 Share Posted December 29, 2019 Incorrect direction in any case, I think. Totally the opposite of what it should do. Link to comment Share on other sites More sharing options...
ED Team BIGNEWY Posted December 30, 2019 ED Team Share Posted December 30, 2019 Reported for review by the team thanks Forum rules - DCS Crashing? Try this first - Cleanup and Repair - Discord BIGNEWY#8703 - Youtube - Patch Status Windows 11, NVIDIA MSI RTX 3090, Intel® i9-10900K 3.70GHz, 5.30GHz Turbo, Corsair Hydro Series H150i Pro, 64GB DDR @3200, ASUS ROG Strix Z490-F Gaming, HP Reverb G2 Link to comment Share on other sites More sharing options...
JTFF - Raph Posted January 25, 2020 Share Posted January 25, 2020 (edited) Wrong position of wingtip (wingflex issue) Hi, the external fuel tanks are giving a strange behavior to the wing flex, as you can see. When loaded the wing tip is pointing to the top (own aircraft view only), when they are not loaded the wingtip is is in good position. The issue is only visible on your own aircraft. On the first picture you can see the wrong angle between the 9x and the amraam. On the second picture, you see the issue on your own aircraft and not on the wingmen as I said before, but you can see the difference. Third picture shows the regular position. Edited January 25, 2020 by FrM | Raph Modules: Nevada, Persian Gulf, Syria, Normandie, FC3, CA, Super Carrier, A-10C, A-10C II, F/A-18C, F-16 C, F-14 B, SA342, and WWII stuff. Hardware: I7 8700K, Geforce GTX 1080Ti 11Go OC, 32Gb RAM, screen resolution 2K Devices: Hotas Warthog, Cougar MFDs, Saitek rudder pedals, Track IR My squadron: http://jtff.fr/SITE/ Link to comment Share on other sites More sharing options...
JTFF - Raph Posted January 25, 2020 Share Posted January 25, 2020 (edited) One more screenshot (front view). One this one we see the difference between 9X and AMRAAM pylons. Edited January 26, 2020 by FrM | Raph Modules: Nevada, Persian Gulf, Syria, Normandie, FC3, CA, Super Carrier, A-10C, A-10C II, F/A-18C, F-16 C, F-14 B, SA342, and WWII stuff. Hardware: I7 8700K, Geforce GTX 1080Ti 11Go OC, 32Gb RAM, screen resolution 2K Devices: Hotas Warthog, Cougar MFDs, Saitek rudder pedals, Track IR My squadron: http://jtff.fr/SITE/ Link to comment Share on other sites More sharing options...
Gnadentod Posted January 27, 2020 Share Posted January 27, 2020 Not sure if it has to do with the wing flex or the model itself but yes, the second most outer weapon mounting points are pointed slightly upward in comparison to the others. Eagles eyes. Screenshot related. Link to comment Share on other sites More sharing options...
Svend_Dellepude Posted January 27, 2020 Share Posted January 27, 2020 https://forums.eagle.ru/showthread.php?t=258640 related i guess. [sIGPIC][/sIGPIC] Win10 64, Asus Maximus VIII Formula, i5 6600K, Geforce 980 GTX Ti, 32 GB Ram, Samsung EVO SSD. Link to comment Share on other sites More sharing options...
ED Team BIGNEWY Posted January 27, 2020 ED Team Share Posted January 27, 2020 merged threads, could be related, the team are looking into it. thanks Forum rules - DCS Crashing? Try this first - Cleanup and Repair - Discord BIGNEWY#8703 - Youtube - Patch Status Windows 11, NVIDIA MSI RTX 3090, Intel® i9-10900K 3.70GHz, 5.30GHz Turbo, Corsair Hydro Series H150i Pro, 64GB DDR @3200, ASUS ROG Strix Z490-F Gaming, HP Reverb G2 Link to comment Share on other sites More sharing options...
FusRoPotato Posted May 28, 2022 Share Posted May 28, 2022 (edited) I was really impressed with wing flexing physics when I got this module, until I realized that when the F16 rolls, especially with AMRAMMS on the wingtips, they twist the wrong direction! This is according to structural twist resistance designed into the wing against lift direction for lift stability by controlling I-beam widths in specified sections in the first 7 wing spars, moment produced by control surfaces, and CG/Inertia of the payload itself. They all contribute to a twist in a stabilizing direction opposite of what is presented graphically in DCS. When I roll left for example, the right wing twists upwards. It should twist down initially. I know some of you might think that's not obvious, that a wing should lift the right side of the plane up, but that's not how wing twist works. The control surface does that work. The wing was designed to dynamically work against it. It's a minor bug sure but probably easy to fix. Edited May 28, 2022 by FusRoPotato 1 Link to comment Share on other sites More sharing options...
Tholozor Posted May 29, 2022 Share Posted May 29, 2022 Already reported: REAPER 51 | Tholozor VFA-136 (c.2007): https://www.digitalcombatsimulator.com/en/files/3305981/ Arleigh Burke Destroyer Pack (2020): https://www.digitalcombatsimulator.com/en/files/3313752/ Link to comment Share on other sites More sharing options...
FusRoPotato Posted May 29, 2022 Share Posted May 29, 2022 That appears to be a different issue. Link to comment Share on other sites More sharing options...
Tholozor Posted May 30, 2022 Share Posted May 30, 2022 Bignewy mentions in-flight wing flex. REAPER 51 | Tholozor VFA-136 (c.2007): https://www.digitalcombatsimulator.com/en/files/3305981/ Arleigh Burke Destroyer Pack (2020): https://www.digitalcombatsimulator.com/en/files/3313752/ Link to comment Share on other sites More sharing options...
FusRoPotato Posted May 30, 2022 Share Posted May 30, 2022 (edited) I'm not reporting a wing flex issue, I'm reporting a wing twist issue. There's a difference. It's a separate problem that was not mentioned in that thread. Luckily the fix should be much easier. The direction just needs to be negated for each wing animation. They are simply backwards. Edited May 30, 2022 by FusRoPotato Link to comment Share on other sites More sharing options...
FusRoPotato Posted May 31, 2022 Share Posted May 31, 2022 Actually found some footage of sharp rolls with AMRAAMS loaded on the wingtips. Link to comment Share on other sites More sharing options...
dorianR666 Posted June 3, 2022 Share Posted June 3, 2022 On 5/29/2022 at 1:25 AM, FusRoPotato said: I was really impressed with wing flexing physics when I got this module, until I realized that when the F16 rolls, especially with AMRAMMS on the wingtips, they twist the wrong direction! This is according to structural twist resistance designed into the wing against lift direction for lift stability by controlling I-beam widths in specified sections in the first 7 wing spars, moment produced by control surfaces, and CG/Inertia of the payload itself. They all contribute to a twist in a stabilizing direction opposite of what is presented graphically in DCS. When I roll left for example, the right wing twists upwards. It should twist down initially. I know some of you might think that's not obvious, that a wing should lift the right side of the plane up, but that's not how wing twist works. The control surface does that work. The wing was designed to dynamically work against it. It's a minor bug sure but probably easy to fix. i think you should post this in the F-16 section, rather than this DCS world section. that place gets much more attention https://forum.dcs.world/forum/333-bugs-and-problems/ 1 CPU: AMD Ryzen 5 1600X GPU: AMD RX 580 Link to comment Share on other sites More sharing options...
ED Team BIGNEWY Posted June 10, 2022 ED Team Share Posted June 10, 2022 threads merged, this has been reported. thanks Forum rules - DCS Crashing? Try this first - Cleanup and Repair - Discord BIGNEWY#8703 - Youtube - Patch Status Windows 11, NVIDIA MSI RTX 3090, Intel® i9-10900K 3.70GHz, 5.30GHz Turbo, Corsair Hydro Series H150i Pro, 64GB DDR @3200, ASUS ROG Strix Z490-F Gaming, HP Reverb G2 Link to comment Share on other sites More sharing options...
Cydrych Posted March 4 Share Posted March 4 Noticed this today. When pulling high G and the wings bend the left wing LEF develops a kink near the RWR antenna. The right wing doesn't do this. The kink goes away and the LEF goes back to normal when not pulling G.null 2 Link to comment Share on other sites More sharing options...
ED Team BIGNEWY Posted March 4 ED Team Share Posted March 4 This is reported and I have merged the threads. I will bump the report internally. thanks 1 Forum rules - DCS Crashing? Try this first - Cleanup and Repair - Discord BIGNEWY#8703 - Youtube - Patch Status Windows 11, NVIDIA MSI RTX 3090, Intel® i9-10900K 3.70GHz, 5.30GHz Turbo, Corsair Hydro Series H150i Pro, 64GB DDR @3200, ASUS ROG Strix Z490-F Gaming, HP Reverb G2 Link to comment Share on other sites More sharing options...
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