ATR LNAV tracking

Bug Reporting Hub Aircraft & Systems
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1

:wave: Thank you for using the Bug section, using templates provided will greatly help the team reproducing the issue and ease the process of fixing it.

2 tags are required: One for platform, and one for aircraft.

Are you using Developer Mode or made changes in it?

No

Have you disabled/removed all your mods and addons? If the issue still occurs with no mods and add-ons, please continue to report your issue. If not, please move this post to the Community Support section.

Yes

Which aircraft are you reporting an issue about? (Please also add the proper tag for it)

Asobo Hans ATR

Which aircraft version are you experiencing this issue on? (You can find this listed in the Content Manager under the Aircraft Name)

v1.0.31

Brief description of the issue:

The aircraft is incapable of flying a simple SID. Ex: GDV4J at Tenerife North.

Provide Screenshot(s)/video(s) of the issue encountered:

This is how it’s published on charts.

Chart
Chart782Ă—437 80.4 KB

How he actually draws it on ND
ND
ND951Ă—981 74.2 KB

Now, the record on how he flies the SID.
Record
Record804Ă—490 23.1 KB

How the Fenix flies it.
Renix Record
Renix Record858Ă—453 46 KB

Detailed steps to reproduce the issue encountered:

Start flight a Tenerife North RWY 30 and select GDV4J departure.

PC specs and/or peripheral set up if relevant:

Build Version # when you first started experiencing this issue:

Since addon release…

:loudspeaker: For anyone who wants to contribute on this issue, Click on the button below to use this template:

Do you have the same issue if you follow the OP’s steps to reproduce it?

Provide extra information to complete the original description of the issue:

If relevant, provide additional screenshots/video:

1 Like
3

:wave: Thank you for using the Bug section, using templates provided will greatly help the team reproducing the issue and ease the process of fixing it.

2 tags are required: One for platform, and one for aircraft.

Are you using Developer Mode or made changes in it?

no

Have you disabled/removed all your mods and addons? If the issue still occurs with no mods and add-ons, please continue to report your issue. If not, please move this post to the Community Support section.

none

Which aircraft are you reporting an issue about? (Please also add the proper tag for it)

ATR 72-600

Which aircraft version are you experiencing this issue on? (You can find this listed in the Content Manager under the Aircraft Name)

latest update

Brief description of the issue:

LNAV isn’t tracking route properly. Will turn early and then wave left and right trying to get back on course

Provide Screenshot(s)/video(s) of the issue encountered:

see attached video of EGPF PTH4A departure as example

Detailed steps to reproduce the issue encountered:

Happens on most flights but runway 23 at EGPF taking the PTH4A departure route. Also had it happen on EGPF 23 LUSI1A departure where I had to abandon the route and use direct to in order to get it back on track. Also EGBB 33 CROF1B arrival which has you overfly the airport before turning back to final. Overshot the CF waypoint and had to be manually flown back onto the approach

PC specs and/or peripheral set up if relevant:

xbox series x

Build Version # when you first started experiencing this issue:

current

:loudspeaker: For anyone who wants to contribute on this issue, Click on the button below to use this template:

Do you have the same issue if you follow the OP’s steps to reproduce it?

Provide extra information to complete the original description of the issue:

If relevant, provide additional screenshots/video:

1 Like
4

Is that the same issue than this existing one ?

5

Is that the same issue than this open bug report ?

Or this one ?

If so, please contribute to the corresponding one, it will help for bug confirmation.

6

That looks more like a routing issue rather than the aircraft not following the route shown on the ND.

If they found themselves off the route due to taking a turn too fast or for some other reason, all other aircraft in the sim would track towards the next waypoint while also trying to get back onto the route if the next waypoint was far enough away. The ATR just heads straight for the route line at right angles to where it is going but then changes its mind to fly towards the waypoint but then changes its mind again back towards the route etc etc. Eventually flies straight through the track line between the waypoints and then oscillates either side of the line before eventually settling

2 Likes
7

Do you have the same issue if you follow the OP’s steps to reproduce it?

Provide extra information to complete the original description of the issue:

I am also getting a strange SID routing when departing TFN via the ARACO 1W Dep. v1.0.36 of the ATR.

If relevant, provide additional screenshots/video:

Screenshot (469)
Screenshot (469)1920Ă—1080 135 KB

8

Have you disabled/removed all your mods and addons? If the issue still occurs with no mods and add-ons, please continue to report your issue. If not, please move this post to the Community Support section.

Yes

Which aircraft are you reporting an issue about? (Please also add the proper tag for it)

ATR42/72-600

Which aircraft version are you experiencing this issue on? (You can find this listed in the Content Manager under the Aircraft Name)

1.0.36

Brief description of the issue:

when you leave MUCU airport with SID senso 2 transition avadu the plane makes a half turn between rorto and CU715. The problem occurs with basic airacs and navigraph.

Provide Screenshot(s)/video(s) of the issue encountered:

atr problem
atr problem1858Ă—885 108 KB

1 Like
9

Do you have the same issue if you follow the OP’s steps to reproduce it?

I am having similar issue with LNAV during departure VAL1G from LYBE airport. After departure, the plane keeps doing 360° turns to the left instead of flying directly to KUPIN waypoint.

Provide extra information to complete the original description of the issue:

Select LYBE as your departure airport, runway 30L. In FMS in enter From/To LYBE/LYTV, select departure runway 30L, SID VAL1G. Take off, select LNAV and IAS, engage autopilot. The plane will start a left turn towards waypoint KUPIN, but then continues left and makes a 360° turn. This is repeated several times if pilot doesn’t manually intervene.

If relevant, provide additional screenshots/video:

image
image1920Ă—1080 125 KB

10

I believe in this case, because the flightpath has an abrupt turn immediately after takeoff, the airplane does not intercept the flight plan path before the AP is engaged.
It is past the interception point, and the airplane will not automatically turn.
In this case, you need to select HDG ( or manually fly) and turn the aircraft to intercept the flightpath.
The direct to function could also be used.
When it does intercept, LNAV will take over.
Not all aircraft will automatically turn to intercept the flightpath when the AP & LNav are engaged.

1 Like
11

After I saw that the airplane is turning left off course, I entered DTO to KUPIN. The autopilot proceeded directly to the waypoint, but after approx 1 minute it started turning left off course again.

1 Like
12

Did you checked the Fligh Plan was still there after DTO ?

In any case, after DTO following, we have to ensure the aircraft is set to the proper location, altitude and bearing before it will enter to the next part of the flight plan using LNAV and VNAV

13

Same thing over here. This thing can’t fly a DME ARC or a teardrop VOR DME for it’s life. It gets to the INTERCEPT part of the procedure and just flies straight without flying the proper ARC

14

Same thing over here. This thing can’t fly a DME ARC or a teardrop VOR DME for it’s life. It gets to the INTERCEPT part of the procedure and just flies straight without flying the proper ARC

15

I had the same problem using the RAMOK3A departure in LSZB. It does not draw the route correclty on the Navigation Display and then just starts flying circles until I make a direct to the next waypoint. RAMOK:

image
image978Ă—981 90.4 KB

16

:wave: Thank you for using the Bug section, using templates provided will greatly help the team reproducing the issue and ease the process of fixing it.

2 tags are required: One for platform, and one for aircraft.

Are you using Developer Mode or made changes in it?

NO

Have you disabled/removed all your mods and addons? If the issue still occurs with no mods and add-ons, please continue to report your issue. If not, please move this post to the Community Support section.

YES

Which aircraft are you reporting an issue about? (Please also add the proper tag for it)

ATR-72

Which aircraft version are you experiencing this issue on? (You can find this listed in the Content Manager under the Aircraft Name)

1.0.36

Brief description of the issue:

LEBL rwy 02 OLOX1S departure. LNAV was following SID first without issues even for tighter turns. Suddenly when flying straight line from BL709 to BL710 started to make hard turn left, LNAV and AP still active. Direct again to BL710 didn’t nothing. Direct to next waypoint BL711 made aircraft turn right and towards that waypoint.

Provide Screenshot(s)/video(s) of the issue encountered:

Detailed steps to reproduce the issue encountered:

PC specs and/or peripheral set up if relevant:

Build Version # when you first started experiencing this issue:

1.36.2.0

:loudspeaker: For anyone who wants to contribute on this issue, Click on the button below to use this template:

Do you have the same issue if you follow the OP’s steps to reproduce it?

Provide extra information to complete the original description of the issue:

If relevant, provide additional screenshots/video:

image
image527Ă—788 49.4 KB

17

Issue this time even more worse. ELLX rwy 24 ARCK1R departure. After takeoff all good and expected LNAV track seemed perfect compared to charts. AP on and NAV follows straight track to LX06F fine. Then first right turn after LX06F, aircraft didn’t follow the turn course which was predicted in ND but turned much more harder to right, losing track and then just kept on turning right losing also intercept course to next track, until I intervened switching to HDG mode, making new direct to next waypoint and switching back to NAV mode. But then aircraft was unable to maintain straight track line no matter what, kept on banking hard right and left, always overshooting track line. No changes in winds which would have caused wind compensation not to able to follow. This S-curving continued all the way up to even waypoint next to that one which I made direct.

Screenshots of first turn in ND and charts, can just see where the LNAV track and where aircraft actually goes. Was flying in IVAO so took screenshot of left-right S-curving also.

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image1148Ă—822 79.2 KB

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image584Ă—667 22 KB

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image654Ă—629 47.6 KB

18

It’s so annoying how it just won’t follow SID routes without going crazy and needing intervention with a direct to. Really needs fixed along with the reverse thrust axis that lets you travel backwards at 70kts and makes it possible to land on a helipad

20

Do you have the same issue if you follow the OP’s steps to reproduce it?

Yes

Provide extra information to complete the original description of the issue:

I have noticed similar behavior with the autopilot and/or CDI tracking RNAV SIDs, especially with flyover waypoints followed by a turn. See the LIDO1R at TFFF or the MODOR2 at TNCM for similar behavior.

1 Like
21

I’m writing to follow up the problem I, along with several other community members, reported back in November regarding the ATR72. As of today, we have not received any feedback, updates, or solutions from the developer or customer service teams.

This issue significantly affects our experience, and we were hoping for some support to solve it. Could we kindly get an update on the status? Understanding any progress or challenges you’re facing would be greatly appreciated.

We’re all eager to enjoy the ATR72 to its fullest potential.

6 Likes
22

I have the exact same issue with the aircraft “s-curving” the first leg of the SID departure.
No mods, latest version, Steam version.

Just writing here to keep the thread alive.