Rainmaker Posted March 29, 2011 Posted March 29, 2011 Just so no one freaks out the way I did, it appears that surface level winds effect engines when they running around idle as well. I set a night mission last night, with low level winds around 6 m/s. Startup and taxi were uneventful, but when I stopped short of the active to ask for takeoff clearance(and I am presuming facing the wind), my engine FTIT and fuel flow started going ape-sh*t. I noticed it first audibly and it took me a while to figure it out. I throttled up a bit, and it diminished to almost nothing, chopped back to idle and it returned. Must admit it freaked me out a bit. When I turned on to the active, it went back to normal. It's awesome that the fidelity is high enough that it will literally model stuff like this, but must admit it freaked me out quit a bit at first.
Rainmaker Posted March 30, 2011 Author Posted March 30, 2011 Okay...so...an update Same weather numbers, just few the same mission but in the daytime. Same spot on the ramp, same heading. This time, the #1 engine just crapped out and shut down. Fired up the APU, motored, restarted...worked like a champ. Engines stayed up as long as I had them above idle... So new question is...would the flameout be considered a bug? I can understand the flux in the FTIT and the fuel flow...but shutting all the way down? Maybe Paul or someone with some engine run experience can shed some light on this.
Snoopy Posted March 30, 2011 Posted March 30, 2011 Okay...so...an update Same weather numbers, just few the same mission but in the daytime. Same spot on the ramp, same heading. This time, the #1 engine just crapped out and shut down. Fired up the APU, motored, restarted...worked like a champ. Engines stayed up as long as I had them above idle... So new question is...would the flameout be considered a bug? I can understand the flux in the FTIT and the fuel flow...but shutting all the way down? Maybe Paul or someone with some engine run experience can shed some light on this. Never heard of this happening real world.... The only time we worry about wind direction/speed is when we have to put a jet on the trip pad for high powered engine runs, then you have to have the intakes directed towards the wind. other than that the wind shouldn't be an issue. Do you have a track so I can try to diplicate? v303d Fighter Group Discord | Virtual 303d Fighter Group Website
ED Team Yo-Yo Posted March 30, 2011 ED Team Posted March 30, 2011 Okay...so...an update Same weather numbers, just few the same mission but in the daytime. Same spot on the ramp, same heading. This time, the #1 engine just crapped out and shut down. Fired up the APU, motored, restarted...worked like a champ. Engines stayed up as long as I had them above idle... So new question is...would the flameout be considered a bug? I can understand the flux in the FTIT and the fuel flow...but shutting all the way down? Maybe Paul or someone with some engine run experience can shed some light on this. Can you attach the mission to check? Ніщо так сильно не ранить мозок, як уламки скла від розбитих рожевих окулярів There is nothing so hurtful for the brain as splinters of broken rose-coloured spectacles. Ничто так сильно не ранит мозг, как осколки стекла от разбитых розовых очков (С) Me
MrYenko Posted March 30, 2011 Posted March 30, 2011 Whenever you trim a jet engine, the wind is a factor. But I've never heard of one shutting down, or having problems starting, due to wind.
Snoopy Posted March 30, 2011 Posted March 30, 2011 Whenever you trim a jet engine, the wind is a factor. But I've never heard of one shutting down, or having problems starting, due to wind. You're correct whenver we trim a jet their is no doubt it has to be facing the direction of the wind but anytime we take a jet to the trim pad for any kind of engine run we line it up with the wind "just in case". v303d Fighter Group Discord | Virtual 303d Fighter Group Website
ED Team Yo-Yo Posted March 30, 2011 ED Team Posted March 30, 2011 (edited) I just tried to check this issue... no luck. I suspected turbulence... I tried 6 m/s wind w/o turbulence (frankly we always have little turbulence if wind presents) and then 6 m/s with 3 m/s (30 in the ME window) turbulence. I taxied around a point circle by circle - and no sign of unstable engine behaviour... may be dirty fuel? :) Now I suspect an artefact in the atmosphere. If we have erratic wind vector it can cause an abrupt pressure and temperature change in the engine inlet and it can lead to the flame-out. Edited March 31, 2011 by Yo-Yo Ніщо так сильно не ранить мозок, як уламки скла від розбитих рожевих окулярів There is nothing so hurtful for the brain as splinters of broken rose-coloured spectacles. Ничто так сильно не ранит мозг, как осколки стекла от разбитых розовых очков (С) Me
jeffyd123 Posted March 30, 2011 Posted March 30, 2011 When idling in my mission "Surf-N-Turf", which has 18M/s turbulence and 6M/s wind on the ground, the engine idle does fluctuate but I havent seen one stall. i7 8700K @ 4.4Ghz, 16G 3200 RAM, Nvidia 1080Ti, T16000 HOTAS, TIR5, 75" DLP Monitor
Merlin216 Posted March 30, 2011 Posted March 30, 2011 After playing a certain mission on the Iron Angels server, myself and a friend both had issues with the engines quitting due to the wind. It was only on that mission, and only when we had the plane facing a certain direction (I cannot remember what direction). The only solution was to keep the engines running on a decent bit of power until we were airborne. [sIGPIC][/sIGPIC] Rig Asus P8P67 | Corsair 750wTX | i5-2500k Quad Core at 4.6Ghz | ASUS GTX570 1280mb | G.Skill Sniper 8gb DDR3 1600MHz | 23.6" ASUS VS247 + 22" Dell Secondary 1680X1050 | Hyper 212+ Cooler | CM Storm Scout Mid case | Windows7 HP 64bit | Lycosa Keyboard | Deathadder Mouse | Logitech G930 Wireless Headset | Logitech X-240 2.1 Speakers | TrackIR 4 | Saitek X-52 HOTAS stick | CH Rudder Pedals | 2 Saitek Throttles |
luckybob9 Posted March 30, 2011 Posted March 30, 2011 (edited) I seem to get a stall/ complete engine shutdown every few times i start up in that mission. Yo-Yo, ill attach the mission. It always seemed to happen at Batumi when I taxied from the strip between the parking area and the runway. I have also had it happen as turning onto the runway from that little taxiway strip, taking off facing the ocean.Surf-N-Turf - COOP-10-v4.miz Edited March 30, 2011 by luckybob9 Nevada map contributer EDM Modeling tools FAQ: http://forums.eagle.ru/showpost.php?p=1418067&postcount=1 Seo libh a chairde is chanadh liom. Líonaigí'n oíche le greann is le spórt. Seo sláinte na gcarad atá imithe uainn. Mar cheo an tsléibhe uaine, iad imithe go deo
Rainmaker Posted March 30, 2011 Author Posted March 30, 2011 (edited) I just tried to check this issue... no luck. I suspected turbulence... I tried 6 m/s wind w/o turbulence (frankly we always have little turbulence if wind presents) and then 6 m/s with 3 m/s (30 in the ME window) turbulence. I taxied around a point circle by circle - and no sign of unstable engine behaviour... may be dirty fuel? :) Now I suspected an artefact in the atmosphere. If we have erratic wind vector it can cause an abrupt pressure and temperature change in the engine inlet and it can lead to the flame-out. Well, I didn't think it was a factor...but I also have turbulance enabled in the mission. No track unfortunately because that mission has also givel me the graphics crash. So, I got two issues surrounding that mission. It of course, happens at the point of the first bomb impact. Here is actual mission file. All you should need to do is taxi to runway 07. Hold short before entering runway with throttles at idle, you should almost immediately see the FTIT and fuel flow flux. Not sure if you will actually get the shutdown but you very well might.Bad Guy hunting daytime.miz Edited March 30, 2011 by Rainmaker
ED Team Yo-Yo Posted March 30, 2011 ED Team Posted March 30, 2011 Thank you! Your help is priceless! You've found a well spelled bad place where turbulence you set becomes exraordinary and mighty... We will take care of this place.... But it's a real confirmation that engine model is live though. :) You've caught air disturbances. Ніщо так сильно не ранить мозок, як уламки скла від розбитих рожевих окулярів There is nothing so hurtful for the brain as splinters of broken rose-coloured spectacles. Ничто так сильно не ранит мозг, как осколки стекла от разбитых розовых очков (С) Me
luckybob9 Posted March 30, 2011 Posted March 30, 2011 :-) Nevada map contributer EDM Modeling tools FAQ: http://forums.eagle.ru/showpost.php?p=1418067&postcount=1 Seo libh a chairde is chanadh liom. Líonaigí'n oíche le greann is le spórt. Seo sláinte na gcarad atá imithe uainn. Mar cheo an tsléibhe uaine, iad imithe go deo
Rainmaker Posted March 30, 2011 Author Posted March 30, 2011 But it's a real confirmation that engine model is live though. :) You've caught air disturbances. True dat! Glad I could CONFIRM this for everyone. :D
MrYenko Posted March 30, 2011 Posted March 30, 2011 You're correct whenver we trim a jet their is no doubt it has to be facing the direction of the wind but anytime we take a jet to the trim pad for any kind of engine run we line it up with the wind "just in case". I come from the heavy jet world, where you kinda NEED a blast fence, and your choice is rather limited. :joystick: Waiting for the wind to be calm, or blowing down the fence centerline was always really boring. I will say that watching your boss swing an MD-11 into a blast fence semi-circle with the bottom winglet ~2 feet away from the blast fence is... Entertaining. :music_whistling:
Rainmaker Posted March 30, 2011 Author Posted March 30, 2011 I come from the heavy jet world, where you kinda NEED a blast fence, and your choice is rather limited. :joystick: Waiting for the wind to be calm, or blowing down the fence centerline was always really boring. I will say that watching your boss swing an MD-11 into a blast fence semi-circle with the bottom winglet ~2 feet away from the blast fence is... Entertaining. :music_whistling: I come from an afterburning turbofan one...we very much need a blast fence also. :D
Doum76 Posted November 19, 2011 Posted November 19, 2011 (edited) I did encountered the same issue for the first time last night, did readings on these threads, i also, as some, thought the rearming was the prob, so i did 2 test, the same mission as last night, first track (engine-shutdown.trk) normal start up, and engine shut down, wind winds in the ME. Second track (nosd-noram-to-rearm.trk) i made the weater sumemr also, but clear sky, no wind and no problem at all, i made a pattern, landed, rearmed, refueled, take off once more and never had any problem. On the first track with the wind, i also noticed the AoA gauge going crazy, like the fuel flow gauges, and mostly all other gauges. And dunno what i did wrong or it's a bug, but when done refueling, the ATC never replied to me for start-up to be able to ask eprmission to taxi, only time it did replied to me, was on final, calling in Inbound. BTW, it's early, and i didn't ave my second coffee, so no comments about my landing on the taxiway at the end. :pilotfly::joystick: ;) Thanks, Edited December 6, 2016 by Doum76
Doum76 Posted December 4, 2011 Posted December 4, 2011 Well, i forgot to post back them a sorta workaround i've found until 1.1.1.1 in which it is fix. I've tried on the mission i hada prob, and seems to work, i simply add a notch to the thorrle over idle, about 1-2%... enough to be over the least idle throttle, and not enough to start moving forward...
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