DME ARCs: Oh dear!

[Fab10]

I flew a route containing two DME ARCs, one each in the SID & STAR, but the A300 had tremendous issues at both ends.

it is as if it loses track of the sequencing. I let it meander through both procedures to see how it would pan out and yet I had to intervene on both.

Here’s the route:
MMCE/13 CONT2A CONTO DCT ROLMI UT30 CZM UG765 IMOLO UR506 NUDUG L212 VTICO DCT UNG DCT BENON BENON3 MUHA/I06

We are several iterations into the build, yet reading through the forum posts it is apparent that there are still serious flaws in this payware aircraft.

 

[KorEl]

This is a known issue, DME arcs not working, to be fixed, (lets hope)...

[Fab10]

I know, I reported this a while ago, but cannot believe it’s still an outstanding issue. 

[kevink817]

Just tried out the CONT2A SID from MMCE with the new v1.0.9. It followed the DME ARC perfectly, though i had to manually select speeds on waypoints to make sure the plane would not overshoot.

 

[Fab10]

That’s interesting.

I also used FLC and kept it slow but the arc was nowhere near the 10DME point, and it didn’t follow the correct lateral path.

I will try again.

[kevink817]

5 minutes ago, Fab10 said:

That’s interesting.

I also used FLC and kept it slow but the arc was nowhere near the 10DME point, and it didn’t follow the correct lateral path.

I will try again.

180kts let it intercept perfectly. Any more than that and it was drawing an overshoot.

Edited February 28 by kevink817

[Fab10]

I will try at 180kts and I saw the overshoots but still it turned out of sync with the procedure.

That said, we should be cleaned up and going higher & faster.

I'll give it a go though.

[IniSteve]

Hi,

 

Just tried this approach into Havana. The aircraft was able to maintain the arc at 260kias with no issue. (I even sped up to 280 to try and overshoot the turn to no avail)
Can you confirm you're at or near a reasonable landing weight when performing this procedure?
 

[Fab10]

Hi,

I’ve not tried it with the latest build, maybe there were improvements in that area?

I was well below weight limits (the flight was a short hop from MMCE).

I will give it another go, and I really appreciate that a few have provided feedback on this by trying the route.

Thanks!

 

[KorEl]

There are still problems after 1.0.9:

The a/c follows the arc only when there are no waypoints near the start or in the arc. 

If waypoints are near or in the arc the ap seems to be confused, makes a circle and then steers to a random direction.

Example arrival TIGRA2T to LGKR:

When reaching D276W turns right to  a circle, If you select a direct to "intercept" wp it enters the arc, follows it but when reaching D189T it makes a turn and moves away again. 

The full plan:

LIRN/24 GALT8J GALTI M742 LUXIL L995 KAPPO M603 XAPAT Q772 TIGRA TIGR2T LGKR/DIREX.R34

[KorEl]

After 1.1.0:

Still cant fly DME arcs. This version does not do strange things, it just flies between entry and exit of the arc in a straight line.

[unhinged_aviator]

Bummer, that's a pretty big oversight...

[Fab10]

Yes, I noticed that too landing at LGIR, it straightened the ARC.
And still no take-off trim setting…

Not quite the INI Builds of old then. 

Edited April 2 by Fab10

[Crabby]

Did you guys activate the curved segments option in the EFB?  Not realistic, but it is there. 

[KorEl]

Yes, tried this, it displays the arc as a straight line in the ND, even it is set in EFB to show curved paths.

Since 1.0.9 it was working, but with problems (see previous posts)

[Fab10]

Well, I’ve stopped making repaints for this aircraft by way of modest protest!
 

[Fab10]

1 hour ago, Crabby said:

Did you guys activate the curved segments option in the EFB?  Not realistic, but it is there. 

Of course, but this has no bearing on the actual lateral path flown or how it is displayed on the ND (for the DME ARC approaches I have flown).

[richboy2307]

Thanks for your posts guys. It has been logged. 👍

[Fab10]

On 4/4/2024 at 4:31 PM, richboy2307 said:

Thanks for your posts guys. It has been logged. 👍

DME/ARCs are still broken in V1.1.1.

This DME deficiency needs to be addressed, as well as the lack of T/O TRIM setting.

Thank-you for your prompt attention to this.

I feel like going back to my XP version, that was a hole in one.

[richboy2307]

Yes this is still in the works and not in 1.1.1.

Once fixed it will be noted in the changelog below. If not mentioned, safe to assume it is still being worked on.
https://forum.inibuilds.com/forum/398-updates/

[KorEl]

This is fixed with v 1.1.2, although I don't see any mention about it in the update log.

[Fab10]

I am so pleased to hear this, but I haven't the opportunity at the moment to check.

They mention a rebuild of SID/STAR/HOLD entry, so perhaps this encompasses the DME/ARC.

Whichever it is, I am greatly relieved, and my faith and confidence in INIBuilds entirely restored.

Thanks.

Edited July 20 by Fab10

[richboy2307]

On 7/20/2024 at 11:29 PM, KorEl said:

although I don't see any mention about it in the update log.

Yeah unfortunately it got coupled with the new LNAV update in the end, so was missed as being mentioned separately. But yes, it covers all instances of LNAV, including DME ARC procedures.

Thanks!