#2208 Possible route manager bug breaking 777 A/T functionality

[Sidi Liang]

Possible route manager bug breaking 777 A/T functionality
Causing the speed dropping to 000 if cruising speed not entered in route manager

Could be fixed aircraft wise, but it would be good to take a look as it's possible that the 777 is not the only aircraft affected.

https://sourceforge.net/p/flightgear/mailman/flightgear-devel/thread/E8978A5E-CB28-400D-89F7-228082F19B47%40flightgear.org/#msg36459384

[James Turner]

Sidi, please add the following info:

• does the problem occur in 2018.3.5?
• does the problem occur with a nightly build?
• exact steps to reproduce the problem, ideally with the UFO

(If no possible with the UFO, specify the exact aircraft to use, command line options and every sequence to show the problem )

[James Turner]

@sidi762 Can you give a bit more more information on this : especial,y Isaak said it might be fixed with 'next' - and does it occurn in other versions?

[Sidi Liang]

Hi James,

I'm afraid that I really don't have time to test now, sorry. I will
definitely do it as soon as I got any spare time. I've forward your message
to the forum where there are some others reporting this and asking them for
information but haven't got any reply yet.

Kind regards,
Sidi

James Turner jmturner@users.sourceforge.net 于2020年4月19日周日 下午4:49写道：

@sidi762 https://sourceforge.net/u/sidi762/ Can you give a bit more
more information on this : especial,y Isaak said it might be fixed with
'next' - and does it occurn in other versions?

---

• [codetickets:#2208]
  https://sourceforge.net/p/flightgear/codetickets/2208/ Possible route
  manager bug breaking 777 A/T functionality*

Status: NeedInfo
Milestone: 2019.2
Created: Mon Apr 13, 2020 01:56 AM UTC by Sidi Liang
Last Updated: Mon Apr 13, 2020 08:08 AM UTC
Owner: James Turner

Possible route manager bug breaking 777 A/T functionality
Causing the speed dropping to 000 if cruising speed not entered in route
manager

Could be fixed aircraft wise, but it would be good to take a look as it's
possible that the 777 is not the only aircraft affected.

https://sourceforge.net/p/flightgear/mailman/flightgear-devel/thread/E8978A5E-CB28-400D-89F7-228082F19B47%40flightgear.org/#msg36459384

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--
Sidi Liang

[legoboyvdlp]

Actually, did it possibly (unintentionally) get fixed by https://sourceforge.net/p/flightgear/flightgear/merge-requests/221/?

It rings a bell as a situation where cruise speed would be reset to zero.

I'm not familiar with the 777 code, I wonder does it use the cloning API.

[legoboyvdlp]

No, it doesn't seem to. Will check the VNAV code to see if it checks if the route manager speed is set. If its not set, the aircraft code should handle that, we can't provide sensible estimates of cruising speed on the C++ side without knowing what the aircraft type is.