Martin Müller 39 Posted April 27, 2015 Share Posted April 27, 2015 I noticed, that the efficiency of the speedbrake is much lower after hotfix c. Link to comment Share on other sites More sharing options...
Rafal Haczek 1612 Posted April 27, 2015 Share Posted April 27, 2015 There's hotfix D now. Try it. Link to comment Share on other sites More sharing options...
Martin Müller 39 Posted April 27, 2015 Author Share Posted April 27, 2015 Same problem with hf D. Link to comment Share on other sites More sharing options...
Cheyenne Chief Pilot 829 Posted April 27, 2015 Share Posted April 27, 2015 Martin, could you pls. state your aircraft variant, A/P on or off, and some figures/screenshots that give an idea about the actual efficiency you're experiencing? Link to comment Share on other sites More sharing options...
AdrianoN 75 Posted April 27, 2015 Share Posted April 27, 2015 The same issue here. A320 IAE. Link to comment Share on other sites More sharing options...
Martin Müller 39 Posted April 27, 2015 Author Share Posted April 27, 2015 t occurs with AP on or off. It occurs on every state of the flight. I set speedbrake to maximum but the speed reducution is much slower than in the old releases. Link to comment Share on other sites More sharing options...
AdrianoN 75 Posted April 27, 2015 Share Posted April 27, 2015 Its also a big issue at the approach phase. Link to comment Share on other sites More sharing options...
Emi 5161 Posted April 27, 2015 Share Posted April 27, 2015 Olivers request for screenshots is valid for both of your Link to comment Share on other sites More sharing options...
Martin Müller 39 Posted April 27, 2015 Author Share Posted April 27, 2015 Here you can see there is no speed reduction with speedbrakes fully out and headwind!! This will result in a missed approach and this is the next problem GA is not working with Hotfix D Link to comment Share on other sites More sharing options...
Emi 5161 Posted April 27, 2015 Share Posted April 27, 2015 To be honest this looks pretty normal to me. 240kt and 1400fpm descend looks ok in my eyes, but I'll ask one of our testpilots to confirm it. Link to comment Share on other sites More sharing options...
Martin Müller 39 Posted April 27, 2015 Author Share Posted April 27, 2015 To be honest this looks pretty normal to me. 240kt and 1400fpm descend looks ok in my eyes, but I'll ask one of our testpilots to confirm it. I think you don't understand the problem: The problem is not to have 240ias at 1400fpm, the problem is, that the speedbrake is not reducing it. This was working fine with 1.21d. Please take a deeper look to this situation above: I'm on a very final approach state. at this state, normally the airbus must reducing speed to "clean speed" but it stuck on 240IAS also with headwind AND speedbrakes fully extanded. Link to comment Share on other sites More sharing options...
Eduard Gasull 258 Posted April 27, 2015 Share Posted April 27, 2015 i dont understand why when you install hotfix there something new that its buggy. Same problem here =( Link to comment Share on other sites More sharing options...
AdrianoN 75 Posted April 27, 2015 Share Posted April 27, 2015 The same issue here. The speed isnt being reduced and it always ends up with go around. Tested it with a320 iae. Two hotfixes so far with the same issue Link to comment Share on other sites More sharing options...
Deputy Sheriffs Tom A320 4915 Posted April 27, 2015 Deputy Sheriffs Share Posted April 27, 2015 i dont understand why when you install hotfix there something new that its buggy. Hello Eduard, this post might explain that (your question, not the speed brake problem). Link to comment Share on other sites More sharing options...
Eduard Gasull 258 Posted April 27, 2015 Share Posted April 27, 2015 Thanks tom! Enviado desde mi iPhone utilizando Tapatalk Link to comment Share on other sites More sharing options...
Cheyenne Chief Pilot 829 Posted April 27, 2015 Share Posted April 27, 2015 (...) The problem is not to have 240ias at 1400fpm, the problem is, that the speedbrake is not reducing it. (...) A GS of 230 kts requires about 1.200 fpm in order to stay on the glideslope. There would be a tendency to accelerate in a clean configuration, I reckon. When speedbrakes are extended in that situation, the added drag goes into fighting the acceleration first. Only "remaining" drag could actually slow the aircraft down. I am not sure about the amount of "surplus drag" in that situation. Specifically in the A320, A/P engagement also reduces speedbrake extension and efficiency. My question here is, what had happened before getting established on the ILS? 240 kts airspeed is way above standard speeds for intercepting either the localizer or the glideslope. Any difficulties to slow down before LOC interception, or was the high speed on the ILS caused by something else? Link to comment Share on other sites More sharing options...
Emi 5161 Posted April 27, 2015 Share Posted April 27, 2015 I think you don't understand the problem: The problem is not to have 240ias at 1400fpm, the problem is, that the speedbrake is not reducing it. This was working fine with 1.21d. Please take a deeper look to this situation above: I'm on a very final approach state. at this state, normally the airbus must reducing speed to "clean speed" but it stuck on 240IAS also with headwind AND speedbrakes fully extanded. Don't worry, I did understand the problem. Your problem is just that you're trying to descend rapidly and slow down at the same time, which is not a very good idea. If you fly 240kt on a Glideslope you can basically immediatly go around. You're just to fast. Speedbrakes are no parachute, they can slow you down, but not very much. You may be over estimating their effectiveness. Link to comment Share on other sites More sharing options...
AdrianoN 75 Posted April 27, 2015 Share Posted April 27, 2015 When you pass over DECEL, the aircraft isnt reducing the SPEED. I even used the speedbreak but no go. I tested A320 IAE. Test it and you will see. PS: I just tried to go around but the aircraft went deep into the ground lol Link to comment Share on other sites More sharing options...
bbarreiros 3 Posted April 27, 2015 Share Posted April 27, 2015 Have you activated Approach phase? Also non standard gear down will create you the needed drag but as say before 240 kts at that stage is already an unstabilized app and you should go around Link to comment Share on other sites More sharing options...
AdrianoN 75 Posted April 27, 2015 Share Posted April 27, 2015 Of course, but speed doesnt reduce. Only happens with a320 iae. Can you test? Link to comment Share on other sites More sharing options...
Matt S 9 Posted April 28, 2015 Share Posted April 28, 2015 Don't worry, I did understand the problem. Your problem is just that you're trying to descend rapidly and slow down at the same time, which is not a very good idea. If you fly 240kt on a Glideslope you can basically immediatly go around. You're just to fast. Speedbrakes are no parachute, they can slow you down, but not very much. You may be over estimating their effectiveness. Emi - My very humble opinion on this is that the perceived loss of speedbrake effectiveness is a SYMPTOM here, and that the root of this issue is the fact that the autothrust is keeping the speed up too long in Managed Speed/Approach Mode for the A320 IAE model. I just did a flight in sort of a standard testing scenario and the system would not let the speed decay down to -S after I selected Flaps 1 (for example)...when it decreased to 200KTS it actually powered up to maintain that speed (which is coincidentally marked as the max speed for (F)laps). The indication on the PFD fluctuated between IDLE and SPEED at that time. I had to pull the speed knob out and deploy speedbrakes, after which the autothrust started to obey my selected speed command. In other words, I believe that the only reason that Martin is blasting down the G/S at 240kts is because the autothrust system in Approach Mode refused to let him slow down in time. Again, per my earlier flight today the CFM seems to work fine on my computer (FSX with Acceleration). We're talking about the same thing over in this thread: http://forum.aerosoft.com/index.php?/topic/94598-speed-not-being-controlled-correctly-on-approach/ Thanks - Matt Link to comment Share on other sites More sharing options...
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