I just purchased this great aircraft and learning how to set it up for a flight using a youtube tutorial.

After entering weights from my (Simbrief) flight plan into the MCDU it then calculates and displays the TO CG and T/O TRIM. I then refer to the EFB which gets populated with the same weights COG% and take off trim. There is a 'button' named SET T.O. TRIM (the video tutorial has it displayed just as SET) which I click on and then according to the video tutorial, the trim is transferred to the center display unit. I see it briefly displayed and then it reduces to 0 (from 1.1).  This doesn't happen in the video tutorial. 

Is there a bug or is this normal?

I can set the trim manually but surely it can be set automatically as described above?

Edited July 7, 20241 yr by Jarnie
remove last question

4 hours ago, Jarnie said:

Is there a bug or is this normal?

Not normal. It should be kept at the value shown in the EFB. Since there are several pages that should be opened in the EFB (payload pages), try different ways until you'll get your value properly transferred to the MCDU.

Then after, it's good idea to reduce it (manually) about 0.2 - 0.3 to get a more realistic trim for take off, otherwise the aircraft will tend to pitch up a bit earlier.

You're right about the aircraft being great. In my opinion, the simulated aircraft still has several bugs, which is a shame after more than a year after its initial release. No manual, and the AP don't work well in certain conditions (my approaches are a lottery, depending how I do the capture when landing using the ILS).

By the way, the ATR tutorials from Emmanuel (aka A330 Driver) in his YouTube channel are excellent and I highly recommend to use those.

Edited July 7, 20241 yr by edpatino

1 hour ago, edpatino said:

...You're right about the aircraft being great. In my opinion, the simulated aircraft still has several bugs, which is a shame after more than a year after its initial release. No manual, and the AP don't work well in certain conditions (my approaches are a lottery, depending how I do the capture when landing using the ILS).

You are right Ed.  Last I heard, the developer was looking at doing the highly requested freight version, so if it arrives, there might be another batch of bug fixes released along with it, I hope!  

We usually set around 1.0-1.4 in the plane for trim, but that leads to an early rotation in the sim, so I usually lower it to around 0.3-0.5 like the other poster stated above.  
 

There’s still a few bugs, but it’s better than it was at the start.  The AC Wild system in particular.  

14 hours ago, edpatino said:

Since there are several pages that should be opened in the EFB (payload pages), try different ways until you'll get your value properly transferred to the MCDU.

I could not find any other pages under Payload however the calculated trim seems to be correctly transferred to the MCDU - see images below. The problem is that after the trim value displayed in the EFB or the trim value displayed in the MCDU gets transferred to the center panel it changes by itself unlike what I see in video tutorials (maybe it used an earlier version of ATR72 and the latest has the bug?

If I click on Set T.O. trim and quickly move my view to the center panel I see that calculated trim correctly displayed for a brief moment and then it slowly reduces (from 1.1) to zero   eg 1.1   1.0  0.9 down to 0.0

Also looking at A330 Driver's first video tutorial he unguards the trim 'lever' and moves it to change the trim which he then shows is 'mirrored' on the center panel. That does not happen when I do the same thing.

Seems I have a very buggy version and I bet they won't give my money back!

Any ideas?

 

14 hours ago, edpatino said:

Then after, it's good idea to reduce it (manually) about 0.2 - 0.3 to get a more realistic trim for take off, otherwise the aircraft will tend to pitch up a bit earlier.

How is the trim set manually?

 

Edited July 8, 20241 yr by Jarnie

I don’t have the ATR but issues like this can sometimes be related to conflicting control assignments. Do you have a keyboard command, or a button, or some other input device mapped to something that neutralizes trim?

 

 

1 hour ago, prolixindec said:

Do you have a keyboard command, or a button, or some other input device mapped to something that neutralizes trim?

Thanks for your response and suggestion.

Yes I have two buttons on my joystick set up to set trim up and down. Even if not pressed could that be neutralising the trim?

I don’t know for sure. Some aircraft have a command that’s called something like “neutralize trim” or “center trim” or it could even be “reduce trim.” You might check all your assignments and verify that nothing like this has been unknowingly assigned to some key or button that you’re not expecting. You might even have it assigned in two places, one that you know about, and another that you’re unaware of. So I’d just read through all of your assignments, and look for something like this.

Thanks for your responses.

I just went into controls settings found the joystick assignments (I have set up for trim up/down) and cleared them. I also searched for trim in keyboard and mouse controls and found none.

Beats me. As mentioned before the trim setting on the center console does nothing yet in the video tutorials it does and clicking on Set T.O. Trim in the EFB initially transfers it to the center panel which then changes it slowly back to 0.

Hopefully someone else will pick up on this and suggest what is causing it.

 

BTW to see what I am seeing (select Set T.O. trim and then the trim display on the center panel changing) you can download a very short video clip (5 seconds) from here https://mega.nz/file/JHsj1YSI#H-__pzDjC4qh9GgeGld_0eCY3WqEUCeIavdWKTQUuqo

Edited July 8, 20241 yr by Jarnie
add video clip

10 hours ago, Jarnie said:

How is the trim set manually?

Look at the A330 Driver video (titled something like "9 tricks about the microsoft ATR"). Anyway, the trim lever is located to the middle back of the pedestal. You have to press it first to lift the cover and then you'll can click up/down using your mouse wheel.

1 hour ago, edpatino said:

Look at the A330 Driver video (titled something like "9 tricks about the microsoft ATR"). Anyway, the trim lever is located to the middle back of the pedestal. You have to press it first to lift the cover and then you'll can click up/down using your mouse wheel.

No, that’s the standby trim and it’s not used to set trim.  
 

Elevator trim is electrically set via the switches on the yoke.  

3 hours ago, ATRguy said:

No, that’s the standby trim and it’s not used to set trim.  
 

Elevator trim is electrically set via the switches on the yoke.  

Noted. Thanks so much.

11 hours ago, edpatino said:

Look at the A330 Driver video (titled something like "9 tricks about the microsoft ATR").

Thanks.  I watched that video and there were no tips as such about setting the elevator trim and I could see that when the author set the trim, the value remained constant on the center display!

10 hours ago, ATRguy said:

Elevator trim is electrically set via the switches on the yoke.  

Thanks. Yes I see that and using it, the setting is displayed momentarily on the center display and then slowly returns to zero as before.

Is there something which needs to be set (say on the overhead panel) which locks or prevents the trim being changed? I am no pilot and I am wondering if all the authors of video tutorials don't mention that. A detailed manual would be nice to have.

I am just about ready to forget that I ever purchased this aircraft using my hard earned money. Pity that the marketplace is so transparent and that I can't contact them to complain!

I’m still wondering if the sim is getting a command from somewhere to restore the trim to zero. If it’s not coming from an unexpected button or key binding, then maybe there is some kind of “assist” in action? Maybe a virtual co-pilot, or an external configuration app, or an assistance setting within MSFS? Have you tried removing or disabling all other add-ons except the ATR?

 

16 minutes ago, prolixindec said:

Have you tried removing or disabling all other add-ons except the ATR?

 

I just removed everything from the Community folder (was that what you meant?) and the problem continues. The ATR was not in the community folder, it is located in OneStore.