admroz

Huge speed value on MCP

4 posts in this topic

First and foremost, the problem was caused by my mistake. I forgot to retract flaps and in CRZ the plane started to switch between FMC SPD and MCP SPD (probably caused by flaps speed limits). The problem is that while in MCP SPD mode it shows really huge speed value. I am also not sure what should be the proper plane reaction for such a pilot error.

B733_17.jpg

B733_18.jpg

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Interesting - and you could potentially save some time and land really early at your destination! :lol:

I will try to reproduce and then fix it...

Thanks for the report, Jan

 

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15 hours ago, admroz said:

 I am also not sure what should be the proper plane reaction for such a pilot error

Flap overspeed, blown flaps with following control problems and likely bad ending...

Think maybe X-Plane simulates that if you enable it the failure settings..

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10 hours ago, Morten said:

Flap overspeed, blown flaps with following control problems and likely bad ending...

Think maybe X-Plane simulates that if you enable it the failure settings..

You're right, I enabled "Remove flying surfaces when over speed" (disabled by default? I don't know...) and really bad things happened :lol:

It seems to be not possible to overspeed flaps in VNAV in such scenario (which is good). During CLB there is SPD REST in FMC for flaps and it keeps the limit. Then in CRZ the plane accelerates in FMC SPD mode up to "red tape" and then switches to MCP SPD and slows down, then again FMC SPD, etc.

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