Airbus666 13 Posted August 3, 2017 Share Posted August 3, 2017 Good evening, today I had my first flight with the CRJ. The plane was about to catch its cruise altitude and I wondered why it did not accelerate while pitching down. The plane was leveled off and the speed was maintained even with full thrust. Suddenly, the plane slowed down very fast and entered the red stall area (still with full thrust). Unfortunately, I had to cancel the flight. - P3D V4 is my sim - Win10 is my OS Please login to display this image. Please login to display this image. Link to comment Share on other sites More sharing options...
Senchay 7 Posted August 3, 2017 Share Posted August 3, 2017 Hmm. On this pic i dont see full thrust mode? You lower the throttle step by step, as can be seen in pic. The left display also shows your in Manual mode, with levers at near idle (last pic). Well, it cant accelerate like this. Also, i wonder why you think your pitching down? Your having the nose up :-) Even pretty steep. So lets put together: 1. Youre near idle in throttle. 2. Your pitch is at near 25 degree upwards 3. Flaps are at 0, even your near stall speed 4. Your at 34k feet, where air is thin and you have little room for up/down in thrust/speed. Result is a stall. Its a feature, not a bug, i would say :-) Link to comment Share on other sites More sharing options...
Airbus666 13 Posted August 4, 2017 Author Share Posted August 4, 2017 Unfortunately, I haven't taken a pic of the situation with throttle in idle position. What I didn't recognize is that the plane was pitched up that high. I'll do another flight and check whether I can reproduce it or not. Thanks! Link to comment Share on other sites More sharing options...
Fragged^2 40 Posted August 4, 2017 Share Posted August 4, 2017 Use speed mode to climb at 290 knots and mach .74 after you cross the altitude at which point with current weather and ac weight 290 knots = mach .74. This way the autopilot will adjust the vertical speed accordingly to keep your IAS at selected safe speed during climb. Reduce thrust to appropriate level when you capture cruise altitude. Link to comment Share on other sites More sharing options...
Airbus666 13 Posted August 7, 2017 Author Share Posted August 7, 2017 Gonna try this thanks a lot! Link to comment Share on other sites More sharing options...
JRBarrett 675 Posted August 7, 2017 Share Posted August 7, 2017 Unfortunately, I haven't taken a pic of the situation with throttle in idle position. What I didn't recognize is that the plane was pitched up that high. I'll do another flight and check whether I can reproduce it or not. Thanks! I saw the uncommanded pitch up and related loss of speed only once during testing. In that case, I'm positive it was caused by Active Sky weather injection. I believe there was a sudden drastic change in the barometric pressure due to corrupt data in the weather feed. HiFi has implemented some good "sanity checking" routines in their weather engine to prevent sudden shifts in temperature, wind or pressure caused by bad weather data, but I think it can still happen occasionally. Of course, if you were not using r/w weather, then it may not be the culprit. Link to comment Share on other sites More sharing options...
Airbus666 13 Posted August 7, 2017 Author Share Posted August 7, 2017 Well, that's interesting. I was using real world weather so it might be the case. Today, I'm going to test it and will give feedback. Link to comment Share on other sites More sharing options...
Aerosoft Aerosoft Team [Inactive Account] 51558 Posted August 7, 2017 Aerosoft Share Posted August 7, 2017 I have seen some jumps in wind speeds this weekend that would be rather uncomfortable in a real aircraft. Link to comment Share on other sites More sharing options...
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