Aeroscout Posted December 8, 2015 Share Posted December 8, 2015 I get an odd transient/perturbation when flying under the Hoover Dam bridge. Actually, I get it when flying just above it too, but it's more noticeable when going under. The transient only occurs when I added some wind and turbulence. It does not occur when the default weather is used. Honestly, I couldn't be bothered to investigate it any further, so I have only done it in the F-15C and with the Summer Hot with Wind preset. Here's a video showing the transient. Watch closely when passing under and over the bridge. The case where I flew high over the bridge there was no transient, so it appears to be altitude dependent. I know we're not supposed to be flying under bridges, but considering this is a sim, and this is a pretty prominent and easy bridge to fly under, I thought I'd mention it. 2 DCS Wishlist: 1) FIX THE DAMN RIVERS!!! 2) Spherical or cylindrical panorama view projection. 3) Enhanced input options (action upon button release, etc). 4) Aircraft flight parameter dump upon exit (stick posn, attitude, rates, accel, control volume, control-surface positions, SAS bias, etc). 5) ADS-33 maneuver courses as static objects. 6) Exposed API or exports of trim position and stick force for custom controllers. 7) Select auto multiple audio devices Link to comment Share on other sites More sharing options...
Yurgon Posted December 9, 2015 Share Posted December 9, 2015 I get an odd transient/perturbation when flying under the Hoover Dam bridge. Others have noticed it as well. There's a theory that this might in some way be related to a weird landing flare problem that has been observed at Nellis and McCarran, but I think there's nothing definitive yet as to the nature of that effect or whether it's really related to this one. In any case, good video, that really helps to show the effect! :thumbup: I know we're not supposed to be flying under bridges, [...] Wait, we're not? Tell you what. Whoever said that doesn't know the first thing about flying. ;) 1 Link to comment Share on other sites More sharing options...
Mike77 Posted December 9, 2015 Share Posted December 9, 2015 Excellent video! Thank you for that. Very cool. I can't wait to fly the A-10C under the bridge and around that area :) Fun stuff! Sent from my iPhone using Tapatalk. System specs: Windows 7 Pro, EVGA X58 3x classified 3 MOBO, i7 960 @3.2Ghz, 24Gb Ram, Nvidia EVGA GTX 780ti with 3 Gb VRAM. 12th Gen i7 12700K, MSI Z690 Edge mobo, 32 GB of DDR4-3600 RAM (G.Skill Ripjaws V CL16). Gigabyte RTX4080 Eagle OC (Triple Fan, 16GB VRAM), ACER XV322QU 32" IPS monitor (running 2560x1440). 2TB NVMe M.2 Internal SSD (3D TLC NAND PCIe Gen 4 x4). Windows 11. Link to comment Share on other sites More sharing options...
SkateZilla Posted December 9, 2015 Share Posted December 9, 2015 tbh it looks like a shadow rendering bug. will give some runs tonight a d see if I can re produce. Windows 10 Pro, Ryzen 2700X @ 4.6Ghz, 32GB DDR4-3200 GSkill (F4-3200C16D-16GTZR x2), ASRock X470 Taichi Ultimate, XFX RX6800XT Merc 310 (RX-68XTALFD9) 3x ASUS VS248HP + Oculus HMD, Thrustmaster Warthog HOTAS + MFDs Link to comment Share on other sites More sharing options...
Art-J Posted December 9, 2015 Share Posted December 9, 2015 tbh it looks like a shadow rendering bug. will give some runs tonight a d see if I can re produce. We're not talking about "falling shadow - something" glitch, which is indeed there, but about small but very noticeable "jerk" of an airplane (mostly around yaw axis), right when it flies under the bridge. When I first noticed it in the Mustang, I thought it's an intended simulation of air flow being disturbed between the bridge and the dam. I don't know if that's the case, but I wouldn't mind finding out :). i7 9700K @ stock speed, single GTX1070, 32 gigs of RAM, TH Warthog, MFG Crosswind, Win10. Link to comment Share on other sites More sharing options...
Corrigan Posted December 9, 2015 Share Posted December 9, 2015 I'd say it's almost certainly not intended. The guys in that A-10 thread (http://forums.eagle.ru/showthread.php?t=154018) seem to have linked it to a weird problem with landing too. 1 Win10 x64 | SSDs | i5 2500K @ 4.4 GHz | 16 GB RAM | GTX 970 | TM Warthog HOTAS | Saitek pedals | TIR5 Link to comment Share on other sites More sharing options...
Aeroscout Posted December 10, 2015 Author Share Posted December 10, 2015 (edited) tbh it looks like a shadow rendering bug. will give some runs tonight a d see if I can re produce. I don't care about the shadows much, though I'd like to see that fixed as it can be distracting. What I'm referring to is the slight transient (change in flight path and attitude) as the aircraft passes under the bridge. I flew hands off as I passed over and under every time so that everything's clear and obvious that it's not being caused by control inputs. Of course, that made many of my recoveries pretty close-calls. Others have noticed it as well. There's a theory that this might in some way be related to a weird landing flare problem that has been observed at Nellis and McCarran, but I think there's nothing definitive yet as to the nature of that effect or whether it's really related to this one. In any case, good video, that really helps to show the effect! :thumbup: Thanks, glad it's not just me. Because this only happened to me when I enabled wind an turbulence (though I haven't tested either individually) my current theory is ED did some turbulence mapping, increasing turbulence over paved areas. If they made it a function of height, it could explain why the effect is more noticeable under the bridge than over it. I'll have a look at the thread. When I first noticed it in the Mustang, I thought it's an intended simulation of air flow being disturbed between the bridge and the dam. I don't know if that's the case, but I wouldn't mind finding out :). That was actually my first thought too, but the transient occurs very consistently directly under the bridge. Edited December 10, 2015 by Aeroscout DCS Wishlist: 1) FIX THE DAMN RIVERS!!! 2) Spherical or cylindrical panorama view projection. 3) Enhanced input options (action upon button release, etc). 4) Aircraft flight parameter dump upon exit (stick posn, attitude, rates, accel, control volume, control-surface positions, SAS bias, etc). 5) ADS-33 maneuver courses as static objects. 6) Exposed API or exports of trim position and stick force for custom controllers. 7) Select auto multiple audio devices Link to comment Share on other sites More sharing options...
Yurgon Posted December 10, 2015 Share Posted December 10, 2015 If you want to link to this thread over there, go ahead. Already did that yesterday (and someone else linked again today). ;) Link to comment Share on other sites More sharing options...
Cykyrios Posted December 10, 2015 Share Posted December 10, 2015 The same effect is easily noticeable with helicopters, as they are affected as long as they stay under the bridge. You can find a track for the Huey in this thread: http://forums.eagle.ru/showthread.php?t=154325. I can definitely say this is NOT just some sort of turbulence, though, as I managed to turn the engine off and stay in the air... Link to comment Share on other sites More sharing options...
Aeroscout Posted December 11, 2015 Author Share Posted December 11, 2015 I had a look at the landing issue. Something really strange is going on. Notice the significantly different trim positions. DCS Wishlist: 1) FIX THE DAMN RIVERS!!! 2) Spherical or cylindrical panorama view projection. 3) Enhanced input options (action upon button release, etc). 4) Aircraft flight parameter dump upon exit (stick posn, attitude, rates, accel, control volume, control-surface positions, SAS bias, etc). 5) ADS-33 maneuver courses as static objects. 6) Exposed API or exports of trim position and stick force for custom controllers. 7) Select auto multiple audio devices Link to comment Share on other sites More sharing options...
Aeroscout Posted December 12, 2015 Author Share Posted December 12, 2015 Just made another video, this time flying the Huey under the bridge several times. Something really strange is happening here, but at this point, I think it's up to the devs to figure it out. DCS Wishlist: 1) FIX THE DAMN RIVERS!!! 2) Spherical or cylindrical panorama view projection. 3) Enhanced input options (action upon button release, etc). 4) Aircraft flight parameter dump upon exit (stick posn, attitude, rates, accel, control volume, control-surface positions, SAS bias, etc). 5) ADS-33 maneuver courses as static objects. 6) Exposed API or exports of trim position and stick force for custom controllers. 7) Select auto multiple audio devices Link to comment Share on other sites More sharing options...
Firedawg Posted December 16, 2015 Share Posted December 16, 2015 This is epic and very detailed ED actually modeled and coded suicidal gamblers jumping from bridges in the map. :) Link to comment Share on other sites More sharing options...
kam Posted January 3, 2016 Share Posted January 3, 2016 (edited) Not sure if this has been brought up before, but I found the same issue running the release version of 1.5.2 and with the Caucasus map. Try it with this railway bridge in Beslan. Even after landing the Huey under it, the helicopter was pushed along. With collective at 0%. Edited January 3, 2016 by kam Intel 5820k | Asus X-99A | Crucial 16GB | Powercolor Devil RX580 8GB | Win 10 x64 | Oculus Rift | https://gallery.ksotov.co.uk Patiently waiting for: DCS: Panavia Tornado, DCS: SA-2 Guideline, DCS: SA-3 Goa, DCS: S-300 Grumble Link to comment Share on other sites More sharing options...
sobek Posted January 4, 2016 Share Posted January 4, 2016 Nice catch... Good, fast, cheap. Choose any two. Come let's eat grandpa! Use punctuation, save lives! Link to comment Share on other sites More sharing options...
kam Posted January 4, 2016 Share Posted January 4, 2016 A quick video of it. BwmVcDz9vDs 1 Intel 5820k | Asus X-99A | Crucial 16GB | Powercolor Devil RX580 8GB | Win 10 x64 | Oculus Rift | https://gallery.ksotov.co.uk Patiently waiting for: DCS: Panavia Tornado, DCS: SA-2 Guideline, DCS: SA-3 Goa, DCS: S-300 Grumble Link to comment Share on other sites More sharing options...
kam Posted January 4, 2016 Share Posted January 4, 2016 ..And the track :doh:HovercraftHuey.trk Intel 5820k | Asus X-99A | Crucial 16GB | Powercolor Devil RX580 8GB | Win 10 x64 | Oculus Rift | https://gallery.ksotov.co.uk Patiently waiting for: DCS: Panavia Tornado, DCS: SA-2 Guideline, DCS: SA-3 Goa, DCS: S-300 Grumble Link to comment Share on other sites More sharing options...
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