MoeweJonathan Posted February 24, 2019 Report Posted February 24, 2019 Hello everyone, hope you guys had a good weekend, I have an issue with the Saab 340, as it constantly banks to the left without input. I used a clean 11.31r1 installation without plugins/addons and a fresh download of the Saab 340 (ver. 1.5.1). The problem exists with the cargo and the passenger version of the plane. I also noticed a very high pitch up trim when loading the plane, maybe it's related? Best regards MW GizmoLog.txt Log.txt Quote
Goran_M Posted February 25, 2019 Report Posted February 25, 2019 Make sure trims are in the right position by reading the trim indicator. Also, check winds. There’s nothing that should be leaning the aircraft otherwise. Quote
N1K Posted February 25, 2019 Report Posted February 25, 2019 Autopilot's not engaged accidentally is it? A very high pitch up trim on its own sounds like the AP has kicked in Quote
perwel Posted February 25, 2019 Report Posted February 25, 2019 I have that problem too. After takeoff it rolls heavy to the left. Only happens with this Saab, all other airplanes including zibo 737 does not do this. Is this a behavior of the real saab or what is wrong? Quote
MoeweJonathan Posted February 28, 2019 Author Report Posted February 28, 2019 Hey, sorry for the late reply. As the problems persists, I recorded a start & take-off, I also attached the GizmoLog and the logfile of that flight. Timestamps: 3:25 Autostart complete 3:48 Trim heavy nose up 4:46 "Pulsating" engines normal? 5:11 Flaps down and switching hydraulic pump to manual to provoke another trim up condition (successful, but maybe it just happened coincidentally) 5:54 Provoking again without success 6:35 Take-off with banking to the left, me actively countering it GizmoLog_autostart.txt Log_autostart.txt Quote
JGregory Posted February 28, 2019 Report Posted February 28, 2019 5 hours ago, MoeweJonathan said: Hey, sorry for the late reply. As the problems persists, I recorded a start & take-off, I also attached the GizmoLog and the logfile of that flight. Timestamps: 3:25 Autostart complete 3:48 Trim heavy nose up 4:46 "Pulsating" engines normal? 5:11 Flaps down and switching hydraulic pump to manual to provoke another trim up condition (successful, but maybe it just happened coincidentally) 5:54 Provoking again without success 6:35 Take-off with banking to the left, me actively countering it It appears you are using some Saitek hardware, please unplug this and let us know if anything changes. Pulsating engines are not normal and are a result of new engine code from Laminar/Austin in 11.3x. We are working on an update to correct this. Thanks for the video, I will look into the hydraulic switch and the trim up condition. it's difficult to tell from the video but I can't see anything wrong as it relates to the left banking tendency. Again, check your hardware. Quote
N1K Posted March 1, 2019 Report Posted March 1, 2019 (edited) Just gave same thing ago, I got a left roll. Seemed to be aggravated by your power setting.. those engines belong in the bin after the punishment. Using a normal power setting its a more gentle left roll. Real aircraft takes 1.5 units right rudder trim which is too much in the sim, so I guess to your answer, yes. A real saab will do that too under the same circumstances through secondary effect of not enough rudder Rudder trim ever so slightly left of center above the W in yaw on the trims seems to be the mark for XP. Edited March 1, 2019 by N1K Quote
perwel Posted March 1, 2019 Report Posted March 1, 2019 46 minutes ago, N1K said: Just gave same thing ago, I got a left roll. Seemed to be aggravated by your power setting.. those engines belong in the bin after the punishment. Using a normal power setting its a more gentle left roll. Real aircraft takes 1.5 units right rudder trim which is too much in the sim, so I guess to your answer, yes. A real saab will do that too under the same circumstances through secondary effect of not enough rudder Rudder trim ever so slightly left of center above the W in yaw on the trims seems to be the mark for XP. I did suspect that about real saab. Prop aircrafts have a tendency to yaw on takeoff. 48 minutes ago, N1K said: Rudder trim ever so slightly left of center above the W in yaw on the trims seems to be the mark for XP. Should it not be rudder trim to the right? Instead of left!? As you say a real saab needs some right trim. Makes sense when it rolls to left. Anyway I will test first left trim and if it is ok then it is if not I`ll try right trim Thanks for info. This info is what I was looking for. 14 hours ago, JGregory said: it's difficult to tell from the video but I can't see anything wrong as it relates to the left banking tendency. Again, check your hardware. The first thing one checks if strange things is happening is the controllers. In my case it is an Saitek Pro Flight Yoke system with Saitek rudders. Both of them are completely OK. First thing I checked on first flight when it happen. Pressed Pause in XP and open Windows yoke window. Nothing wrong in there. Quote
N1K Posted March 1, 2019 Report Posted March 1, 2019 Right trim, but the position is just left of being dead centre above the W in yaw on the wrim indicator Quote
perwel Posted March 1, 2019 Report Posted March 1, 2019 4 minutes ago, N1K said: Right trim, but the position is just left of being dead centre above the W in yaw on the wrim indicator OK I am about to do a flight right now. I'll post how it goes. Thanks Quote
perwel Posted March 1, 2019 Report Posted March 1, 2019 This is the setting after loading XP. Looks like it already have a little right trim. Or should it be more? Quote
N1K Posted March 1, 2019 Report Posted March 1, 2019 yea, if you put the right base side of the triangle on the left edge of the third point in the W should stop the roll. Quote
perwel Posted March 1, 2019 Report Posted March 1, 2019 Maybe need more trim. Still some left roll, but slower Quote
N1K Posted March 1, 2019 Report Posted March 1, 2019 (edited) That far right But I could swear XP was not as much as Saab'y Mc Saabface.. Edited March 1, 2019 by N1K Quote
alehead Posted March 29, 2019 Report Posted March 29, 2019 How cool is that to provide an image from the real aircraft... Good to know. The yaw that turboprop engines can induce us frightening. Just throttle up the PW150s in a Q400 and see the flight path change. A Quote
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