I understand that LSAS is meant to be simulated according to the real plane. My general understanding of LSAS is that its duty is mainly trimming the stabilizer to assist in vertical (longitudinal) control of the plane when flown by hand. One of its functions seems to be a "pitch hold" feature, i.e. when elevator pressure on the yoke is released, the pitch attitude is kept by LSAS. Please correct me if I'm wrong here.After some "bumpy" manual flight maneuvers yesterday using the new ASE version with windy weather conditions set, I have some troubles making LSAS "work for me", maybe mainly because I have some misunderstanding of the way it is simulated and how I can benefit of it in FS.1.The slider for LSAS "strength" in the PMDG menu is still a riddle for me, I can "feel" no difference between the two most extreme settings (full left/full right). What do I need to look for to see a difference between the settings?2.When I e.g. pitch down the plane so I fly at a constant pitch angle and then release the yoke pressure, pitch is not kept but starts to wander upwards again. The only way I can get a constant pitch is by using trim. I thought trimming is not needed with LSAS activated... All this with no change in airspeed...Andreas

Here's a rundown of what LSAS 'Should' be doing, It works ok for me but to be honest I dont handfly this aircraft as much as I did with the 744Longitudinal Stability Augmentation System (LSAS)LSAS provides:1) Pitch Attitude Hold and Automatic Pitch Trim

Thank you for your attempt to help me, Rob, but your excerpt from the manuals is no answer to my questions...Andreas

Gee, I thought it exactly answered your questions. Maybe you should re-phrase the question.

Thank you for your attempt to help me, Rob, but your excerpt from the manuals is no answer to my questions...Andreas

That wasn't all from the Manuals but if you want the basics :( 1.The slider for LSAS "strength" in the PMDG menu is still a riddle for me, I can "feel" no difference between the two most extreme settings (full left/full right). What do I need to look for to see a difference between the settings?The slider was designed to fit the type of yoke your using - Light is for CH type controls Heavy is for the more high end Hardware, this is what PMDG told me when I asked the question a while back.2.When I e.g. pitch down the plane so I fly at a constant pitch angle and then release the yoke pressure, pitch is not kept but starts to wander upwards again. The only way I can get a constant pitch is by using trim. I thought trimming is not needed with LSAS activated... All this with no change in airspeed...I dont think we can expect the sim to behave 100% like the real thing, when I handfly in good weather the aircraft does it's job at holding pitch, if your flying in rough weather it's going to need a little help. I'm flying to Frankfurt in a hour or so, will test it out in climb & descent

According to the MD-11 pilots, the simulation is pretty darn close. The pitch down and release, expecting LSAS to hold that attitude is not what LSAS is intended to do except for small pitch changes. It does provide pitch dampening and should hold a commanded attitude that is a pitch deviation of less than 5 degrees with some limits regarding bank and altitude.I find flying with LSAS very easy after the first 5 min of getting used to it. I use small attitude corrections and the airplane behaves like it is on rails, but I don't poke it and take my hand off the yoke to see what happens... I'm not a test pilot and I don't fly like that. When hand flying my hand is always on the yoke (or stick if simming).

I understand that LSAS is meant to be simulated according to the real plane. My general understanding of LSAS is that its duty is mainly trimming the stabilizer to assist in vertical (longitudinal) control of the plane when flown by hand. One of its functions seems to be a "pitch hold" feature, i.e. when elevator pressure on the yoke is released, the pitch attitude is kept by LSAS. Please correct me if I'm wrong here.After some "bumpy" manual flight maneuvers yesterday using the new ASE version with windy weather conditions set, I have some troubles making LSAS "work for me", maybe mainly because I have some misunderstanding of the way it is simulated and how I can benefit of it in FS.1.The slider for LSAS "strength" in the PMDG menu is still a riddle for me, I can "feel" no difference between the two most extreme settings (full left/full right). What do I need to look for to see a difference between the settings?2.When I e.g. pitch down the plane so I fly at a constant pitch angle and then release the yoke pressure, pitch is not kept but starts to wander upwards again. The only way I can get a constant pitch is by using trim. I thought trimming is not needed with LSAS activated... All this with no change in airspeed...Andreas

Do you assign/calibrate your controls through FSUIPC? If so, try assigning aileron and elevator via normal FS control menu and see if that helps.

Do you assign/calibrate your controls through FSUIPC? If so, try assigning aileron and elevator via normal FS control menu and see if that helps.

Yes, that is an important setting. Make sure the controlls are processed via the FS interface and not via FSUIPC only. Otherwise LSAS will not work correctly. Jan-Paul

Thank you all for the answers, I guess I have a better understanding now (except for the LSAS slider, I'll keep it set to minimums...).Edit: The reason why I asked for the "set pitch, release and LSAS keeps it" feature was because I read in another forum that in real life trimming is almost not required because of LSAS. If that's true or not, I cannot say. What I can say that I need to trim like in any other plane.Andreas

Thank you all for the answers, I guess I have a better understanding now (except for the LSAS slider, I'll keep it set to minimums...).Edit: The reason why I asked for the "set pitch, release and LSAS keeps it" feature was because I read in another forum that in real life trimming is almost not required because of LSAS. If that's true or not, I cannot say. What I can say that I need to trim like in any other plane.Andreas

Andreas,I have never touched the LSAS slider. I had the exact same problem you describe until I removed the FSUIPC calibration and setup assignments via the FS controller window. Now I no longer have those issues. I now use trim much more rarely and get a more "airbus-like" autotrim.Did you try what we suggested?

While LSAS does provide pitch attitude hold and auto-trim, it does NOT work the same way as on a FBW Airbus.If you release the yoke pressure at an attitude/speed the airplane is not trimmed for, LSAS first tries to maintain that pitch with a maximum of 5

I'll look whether I've assignments for elevator/aileron axis in FSUIPC and report back.Andreas

Yes, that is an important setting. Make sure the controlls are processed via the FS interface and not via FSUIPC only. Otherwise LSAS will not work correctly.

Jan-Paul: Where did you get this information? Would someone from PMDG (Markus?) please confirm whether or not this is true?Thanks.

Jan-Paul: Where did you get this information? Would someone from PMDG (Markus?) please confirm whether or not this is true?Thanks.

Bill,I've asked this a few times in these forums, and PMDG has never confirmed or denied it. Here is the closest answer I got...http://forums1.avsim.net/index.php?s=&...t&p=1574901If you think about it, it kind of makes sense. Regardless of an official answer, this seems to make the LSAS system work as I expect it to...at least for me.