Conner Pierce

CDI Glideslope Not Working

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Howdy, I have noticed the CDI's GS is not active during a LPV approach using the Flight 1 GTN. The GS is not flagged, and the CDI mode is set to GPS. I've tried this on several approaches with no luck. I can get the GS to work on an ILS approach. However, the autopilot will not "follow" the GS on approach mode. I am using P3D V4, DC-6, Flight 1 GTN650, Windows 10. 

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Hi Conner, how have you installed the GTN650?  Are you using the Flight1 tool for that or using the PMDG method?  I assume the GTN lateral guidance is available on the CDI.

To be honest, I beta tested the GTN with DC6 in P3Dv3 only.  I haven't paid the ransom to get the GTN compatible with P3Dv4 yet and cannot verify that LVP works.  Maybe you should contact PMDG directly at PMDG Product Support on a trouble ticket and include the method you use to install the GTN into the DC6.

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1 hour ago, downscc said:

Hi Conner, how have you installed the GTN650?  Are you using the Flight1 tool for that or using the PMDG method?  I assume the GTN lateral guidance is available on the CDI.

To be honest, I beta tested the GTN with DC6 in P3Dv3 only.  I haven't paid the ransom to get the GTN compatible with P3Dv4 yet and cannot verify that LVP works.  Maybe you should contact PMDG directly at PMDG Product Support on a trouble ticket and include the method you use to install the GTN into the DC6.

Howdy, @downscc, I installed the GTN via Flight1's installer. It is the new version (I couldn't help myself and spent the $20 :D..) I just submitted the ticket via the PMDG support system. I will post back here once I find out more. 

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1 hour ago, Conner Pierce said:

Howdy, @downscc, I installed the GTN via Flight1's installer. It is the new version (I couldn't help myself and spent the $20 :D..) I just submitted the ticket via the PMDG support system. I will post back here once I find out more. 

Thanks for reporting this Conner. I have the same issue.

Greg

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Try going to: System -> GPS Status -> SBAS (bottom row button)

Check that the following buttons are selected green: WAAS, EGNOS, MSAS, GAGAN

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2 hours ago, DavidP said:

Try going to: System -> GPS Status -> SBAS (bottom row button)

Check that the following buttons are selected green: WAAS, EGNOS, MSAS, GAGAN

These have been checked green. 

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I am having this exact problem with my gtn 650 on the dc6 from pmdg on p3d v4. I cannot get GS to activate. Im trying to read the garmin trainer manuals but I cant really figure it out. Did anyone come up with the solution? BTW also on my gtn650 the WAAS, EGNOS, MSAS and GAGAN are checked (green). 

I have tried both gps and ils approaches, but its only the lateral part of the signal that is captured. The GS indication on my analogue glass instrument doesnt move. On ils approaches there is a small little line with arrows on both ends on the right side, and the gs needle is staying still just below center. On GPS approaches the little line with arrows is not present, but the gs needle doesnt move. In all cases, there is a white dot on the top left below the greyed out VLOCK and GS indications. The Vlock and GS indications never light up. What am I doing wrong? 

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Not doing anything wrong. Enabling the VNav deviation indication when flying with the GPS needs to be implemented with next update, When I do not know.

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Thanks, Alexander. I'm glad this info is now available on this forum since I spent countless hours scratching my beard and reading manuals trying to understand what I was doing wrong. Now I know that the product has a non-functioning gs indicator when used in combination with the GTN unit. Just for clarification: does the gs indicator work correctly with the default gps unit in p3d v4?

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Andreas,

For ILS approaches with VLOC it works fine as I send you the pics at the ticket.

 

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Just so people know what was said in the pmdg support desk: It should be possible to set the GTN to VLock and by tuning the ils frequency get a normal localizer and glideslope capture "on the needles". As i said to Chris Makris, I already tried that yesterday without success, but I will of course try it again. I will report back on the issue.

Btw, Chris, is this the intended way of the system to work with GTN integration, or is there a bug that is going to be fixed?

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As Alexander said the only bug we are aware and is in the to fix list is that there is no vertical guidance for LNAV/VNAV or LPV approach

 

From my flight today at intercept course with ILS

 

2.jpg.2c5dba609db23c25f41a85b77ba617cb.jpg

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I tried tonight doing an ils with the gtn unit in vlock mode. Both my lateral and vertical needles did not work at all in this mode with the nav radio tuned to the ils freqency. I will show screenshots later (i fly in vr so its a bit of a hassle doing screens). 

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Andreas,

 

i beleive there are settings on gtn as well from the gtn configurator I will check on my fs pc tmr and post them 

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I had problems with A2A airplanes using the GTN750 to follow the GPS route and learnt that in the GTN config tool I had to set the CPU cores to „ALL“ (default is „AUTO“ or something like that. Maybe this helps...

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Oki so I tried a bit more. Here are my new findings:

https://ibb.co/ehQ8im
This picture shows that my gtn unit is in vlock mode and it also shows that im tuned to the ils 110.90 for runway 21 at ENCN. 

https://ibb.co/gkANb6
This picture shows that my glide slope isn't working on the captain side.

https://ibb.co/mecqUR
This picture shows the display working correctly on the co-pilot side. I'm trying to find a switch to make the captain's side work since I dont fly on the right hand seat. Anyone know where it is? I can only find the transponder 1-2 switch. 

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Looks like you've got the ILS tuned on NAV 2.  I'm going to guess that that's what's driving the co-pilot's OBI.  Have you tried tuning it on the GTN?  That sets NAV 1, and I think it'd get you a response on the captain's OBI.  To switch the GTN from COM to NAV, use the middle mouse button to press and hold the small knob.  If I recall correctly, there's also a clickspot on the left side of the knob.  

If you've already tuned the GTN to your ILS frequency, then disregard this - something else must be going on.

Hope this helps.

EDIT:  One more thing - open the Flight 1 GTN configurator, select the DC-6, and make sure the unit is assigned to NAV 1.  I seem to recall that it defaults to NAV 2.  Something else to check.  

  

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10 hours ago, Andreas Stangenes said:

Oki so I tried a bit more. Here are my new findings:

https://ibb.co/ehQ8im
This picture shows that my gtn unit is in vlock mode and it also shows that im tuned to the ils 110.90 for runway 21 at ENCN. 

https://ibb.co/gkANb6
This picture shows that my glide slope isn't working on the captain side.

https://ibb.co/mecqUR
This picture shows the display working correctly on the co-pilot side. I'm trying to find a switch to make the captain's side work since I dont fly on the right hand seat. Anyone know where it is? I can only find the transponder 1-2 switch. 

Andreas,

 

I check the GTN config and I have all at default (Even what Alan suggested I have it at NAV2/). However as Alan said I do not see the GTN NAV, You have set the NAV2 to ILS what about the NAV1 from the GTN?

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I apologize in advance for tagging onto an older thread...maybe my question was answered on the first page of this thread...

I've just gotten back into flying the DC-6 (after purchasing some new Orbx Alaska scenery!). I've finally figured out how to fly this great aircraft without the AFE, start-up to shutdown. For the life of me, on my ILS approaches, I cannot figure out how to get the glide slope capture...the localizer is working fine. I've tried with the Altitude Control both off and on, neither will capture the G/S signal (the plane continues on level flight after the intercept).

I've searched the POH and this forum, this thread is the closest to what I'm observing on ILS approaches.

I'm using the F1 GTN 650 in P3D v4.3

If I read/understood correctly, the G/S capture (failure/bug) is a known issue with the F1 GTN to be resolved in a future update...can this be verified/clarified?

Thanks, Rob Meier

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Let me say I love this DC-6.  Everything is fine, except intercepting the GS Approach with  the AP and using that to DH.  I have the GTN 650 and this is in FSX SE.  With the AP I intercept the Loc perfect every time.  As I approach the GS I am at 150kts, flaps 20 & gear down.  I use the GTN  for the Nav 1 fregs with no problem, but otherwise do not use it.  I only use the aircraft instruments. The GS indicator works fine.  It just doesn't intercept the GS. In fact, I have been hand flying my ILS approaches by hand from the beginning when I couldn't figure how the GS Approach coupler worked.  Yesterday, I decided to try it again.  Went through the manuals again and just shot an approach onto 10R at KBOI.  When the GS needle started to move down, the Gyro Pilot & Altitude Hold were ON, the Mech lever was deflected and we were tracking the LOC.  I turned the Mode Selector to Approach and did not have either light activate.  As the GS needle centered the VS indicated a soft climb which is pretty normal, but did not settle into the decent -same as always for me.  I disengaged the AP and hand flew the rest of the approach.  So, am I missing some setting or operation, or is this waiting for a fix?  This aircraft hand flys a very smooth ILS approach,  Now my only challenge is to get the AP to do it. Thanks for any advise, Mike Nicholson

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Posted (edited)

Mike,

My request just before your's went unanswered...be sure you activate the ILS approach on the GTN (it cannot be in "suspend" mode or the G/S capture will not activate. It took me a little bit to figure it out...I was used to having duplicate NAV1 radios in other aircraft I was using with the GTN...I hadn't seen this issue before (obviously, the only NAV1 frequency for the DC-6 is through the GTN).

Anyway, activating the appraoch on the GTN prior to ILS localizer/glidescope capture and then activating the A/P approach works flawlessly for me on ILS approaches down to DH (but remember, you have to be below the G/S capture for it to work!).

Good luck!

Rob Meier

Edited by rmeier

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Thanks Rob,  Too late to try it this evening, but I will tomorrow.  Take care, Mike Nicholson

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Thanks for the hint Rob! Seems to work with me too, although on yesterdays flight my GTN activated the approach mode on its own... Thats why it sometimes worked, and sometimes not.

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7 hours ago, TheFinn88 said:

Thanks for the hint Rob! Seems to work with me too, although on yesterdays flight my GTN activated the approach mode on its own... Thats why it sometimes worked, and sometimes not.

Yeah, you'll find the Garmin Pilot's Guide very useful to understanding why sometimes this happens and other times not.  There are so many features missing from the default GPS that is really is a good idea to review the Garmin manuals to see what you are missing.

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