FSUIPC7 Thrust reverser breaks built-in MSFS SIM limitation?

[casv]

Hello,

I am having issues to use the thrust reverser with Horizon B787-9 using a button on my Honeycomb Bravo. Behavior described on this link 

https://www.avsim.com/forums/topic/638913-horizon-787-9-v10-released/?do=findComment&comment=5025126

I use these settings just like this

It is working with PMDG 737 for MSFS but not with Asobo/Horizon/Kuro 787 AAU2.

Perhaps you may know why?

Kind regards 

[John Dowson]

So the issue is that you get full power reverse thrust in the B787-9 rather than this be limited (to -4096), but this is ok in the PMDG 737?

I will take a look at this and get back to you, but it may take a few days.

John

[casv]

Yes, that is my impression. However I am not sure about the value -4096. I am just using these settings as in the attached picture. Same settings is fine with PMDG 737. I believe Asobo B787-10 and Kuro B787-8 behaves same like the Horizon B787-9 one, since they almost stop when landing on the runway with the thrust reverser handler active. 
I am using of latest FSUIPC v7.3.25.

The throttle handler has reverse handlers but act as a button when dragging them backwards. See link below.

https://www.etsy.com/se-en/listing/1316706721/boeing-737-thrust-lever-full-set-for-the?ga_order=most_relevant&ga_search_type=all&ga_view_type=gallery&ga_search_query=boeing+737+throttle&ref=sr_gallery-1-1&referrer_page_guid=f73330f6ddd.c55a0b33f5c18965b7b6.00&organic_search_click=1

 

[John Dowson]

I have the Bravo and know how it works. Can you please attach your FSUIPC7.ini   file please, rather than images.

I will look into this later, but I suspect that this is an issue with the aircraft - FSUIPC is just sending the Throttle Decr control/event, and it should be up to the aircraft to know when the limit is reached. So I suspect that the underlying issue must be fixed by the aircraft developers, but it may be possible to use a lua script instead, which would stop sending the Throttle Decr control/event once the limit was reached. I will look into this later and get back to you.

John

[casv]

51 minutes ago, John Dowson said:

I have the Bravo and know how it works. Can you please attach your FSUIPC7.ini   file please, rather than images.

I will look into this later, but I suspect that this is an issue with the aircraft - FSUIPC is just sending the Throttle Decr control/event, and it should be up to the aircraft to know when the limit is reached. So I suspect that the underlying issue must be fixed by the aircraft developers, but it may be possible to use a lua script instead, which would stop sending the Throttle Decr control/event once the limit was reached. I will look into this later and get back to you.

John

Hello John.

FSUIPC7.ini file is attached here.

Thank you.

Kind regards.

FSUIPC7.ini

[John Dowson]

I can confirm this behavior. The max reverse throttle value is defined by the simvar THROTTLE LOWER LIMIT, held in offset 0x0B00. It seems that this value is correctly set - it is -4095 for the 787-9 (and -6092 for the PMDG 737), but it seems that the aircraft is not respecting this limit. This is a problem with the aircraft, not with FSUIPC7.

However, I can add a fix for this - I can add a new ini parameter (ObeyThrottleLowerLimit) which, when set, would inhibit the sending of a Throttle Decr controls, as well as the individual Throttlen Decr ones, once the lower limit has been reached. I can take a look at this over the weekend and will post and updated version here for you to test.

Regards,

John

 

[casv]

Thank you John. I will wait for this updated version to test.

[John Dowson]

Please try the attached version, 7.3.26b, and add
    ObeyThrottleLowerLimit=Yes
to the [General] section of your FSUIPC7.ini file:

FSUIPC7.exe

[casv]

Just tested your updated version, looks like that it is working fine. I was on the runway with the parking brake set to on. And the plane does not move backwards with the reverser active. (That was the case prior to this issue). I guess that this version is good now. Thank you.

[John Dowson]

👍