flight director not working during ILS approach in P3DV4

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vvince
Posts: 63
Joined: Thu Oct 19, 2017 4:27 pm
flight director not working during ILS approach in P3DV4

Post by vvince » Sun Dec 16, 2018 9:35 pm

Hello,

I have been playing quite a bit at different airports with the ILS, and cannot figure if I am doing something wrong, if my plane is broken, or if did not understand ILS in the T38.
During an ILS approach, it seems that the ADI steering needles are not working as they should.
The ILS frequency is properly set, the approach course is set in the HSI, and the Steering Mode switch is on normal :
With the Nav Mode selector on Localizer, I first align roughly with the CDI of the HSI (which is properly working).
Then, looking at the ADI there's as expected only the steering bar (the vertical yellow bar), but it only indicates the bank of the aircraft : the needle is centered when there's no bank, no matter if the plane is on course or off course. And no glide path marker on the left.
Switching the Nav Mode selector to ILS, the glide path marker appears (and properly displays the position of the aircraft with respect to the glide path), as well as the pitch steering bar (the horizontal yellow bar). But the pitch steering bar does not work neither, it does not not steer toward the glide path (but rather keeps centered when the pitch of the aircraft has a certain value).

So to sum up :
(1) no glide path marker when the Nav Mode selector is on Localizer (according to the manual it should be displayed),
and both steering bars of the ADI are not indicating what they should :
(2) the (vertical) steering bar wants you to keep the plane with no banking, and the indication is unrelated to your course deviation,
(3) and the (horizontal) pitch steering bar wants you to maintain a certain pitch (or angle of descent maybe?) but the indication is unrelated to your position with respect to the glide path.
Basically the steering bars do not steer...

I found this older, unanswered, topic with a similar issue :
https://milviz.com/forum/viewtopic.php? ... ils#p57267

Thanks for any help

Vvince.

JonathanBleeker
Posts: 3446
Joined: Sat Mar 13, 2010 7:38 pm
Re: flight director not working during ILS approach in P3DV4

Post by JonathanBleeker » Mon Dec 17, 2018 9:21 am

@N4GIX?

N4GIX
Posts: 1023
Joined: Mon Sep 06, 2010 3:47 pm
Re: flight director not working during ILS approach in P3DV4

Post by N4GIX » Mon Dec 17, 2018 5:52 pm

I have nothing to do with the ADV version of the T38. That would be Alvaro I believe.

JonathanBleeker
Posts: 3446
Joined: Sat Mar 13, 2010 7:38 pm
Re: flight director not working during ILS approach in P3DV4

Post by JonathanBleeker » Mon Dec 17, 2018 5:53 pm

I don't believe he touched the avionics. The flight director is still the same as the non ADV.

Alvaro
Posts: 193
Joined: Mon Dec 15, 2014 2:25 pm
Re: flight director not working during ILS approach in P3DV4

Post by Alvaro » Tue Dec 18, 2018 8:45 am

JonathanBleeker wrote:
Mon Dec 17, 2018 5:53 pm
I don't believe he touched the avionics.
I confirm it.

N4GIX
Posts: 1023
Joined: Mon Sep 06, 2010 3:47 pm
Re: flight director not working during ILS approach in P3DV4

Post by N4GIX » Tue Dec 18, 2018 4:09 pm

Okay then. I'll take a look at this as soon as I can.

vvince
Posts: 63
Joined: Thu Oct 19, 2017 4:27 pm
Re: flight director not working during ILS approach in P3DV4

Post by vvince » Wed Jan 23, 2019 10:39 pm

Any news on this matter?
Cheers
vvince

Richard Portier
Posts: 129
Joined: Wed Jul 08, 2015 11:17 pm
Re: flight director not working during ILS approach in P3DV4

Post by Richard Portier » Sun Apr 07, 2019 4:01 pm

vvince wrote:
Wed Jan 23, 2019 10:39 pm
Any news on this matter?
Cheers
vvince
+1
Richard

vvince
Posts: 63
Joined: Thu Oct 19, 2017 4:27 pm
Re: flight director not working during ILS approach in P3DV4

Post by vvince » Thu Jun 20, 2019 4:45 pm

Any chance that this issue will be addressed some day?
It was reported more than 6 months ago, and still no substantial reply since then ...

Cheers
Vvince

JonathanBleeker
Posts: 3446
Joined: Sat Mar 13, 2010 7:38 pm
Re: flight director not working during ILS approach in P3DV4

Post by JonathanBleeker » Thu Jun 20, 2019 4:47 pm

The T-38A ADV is undergoing a recode at the moment which should solve this issue.

CF104
Posts: 9
Joined: Mon Apr 25, 2016 10:50 pm
Location: YYC
Re: flight director not working during ILS approach in P3DV4

Post by CF104 » Tue Jul 16, 2019 7:16 pm

Hey vvince,

Thanks for confirming this issue that I brought up more than 3 years ago. I'm disappointed that it took Milviz this long to acknowledge a problem.

I hope that they do fix it as the T-38A ADV is a fun plane to fly.

Cheers,

John

JonathanBleeker
Posts: 3446
Joined: Sat Mar 13, 2010 7:38 pm
Re: flight director not working during ILS approach in P3DV4

Post by JonathanBleeker » Tue Jul 16, 2019 7:21 pm

There is quite a bit being changed that should resolve all :) .

vvince
Posts: 63
Joined: Thu Oct 19, 2017 4:27 pm
Re: flight director not working during ILS approach in P3DV4

Post by vvince » Sun Aug 25, 2019 8:42 am

JonathanBleeker wrote:
Tue Jul 16, 2019 7:21 pm
There is quite a bit being changed that should resolve all :) .
Will the issues only be solved on the new Redux version, or also on the older T38A?

JonathanBleeker
Posts: 3446
Joined: Sat Mar 13, 2010 7:38 pm
Re: flight director not working during ILS approach in P3DV4

Post by JonathanBleeker » Sun Aug 25, 2019 8:44 am

Only on the redux. The code has been redone completely.


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