|
-
POSTING RULES

-
Donate yearly (please).
-
Advertise in here!
-
Today's Posts
|
Insert Pics
|

10-07-2018, 02:46 PM
|
|
|
|
Join Date: Dec 2011
Location: Livermore, CA
Posts: 6,797
|
|
Quote:
Originally Posted by swordtail
I have a magnetometer and two G5's and I get the same message #2 on my GTN650 also. I am lost! My 650 won't fly approaches when directed to my Trio Pro pilot but Ifly 740 takes me to the airport just fine. All these boxes and updates, I wish they would play together quietly.
|
I think your problem may be related to the format change in the new software. Your Trio may be unable to read the new arinc format (Garmin 429). I too wish everyone would play quietly together, but that?s not the real world. In the real world, if you are the sole source of TSO?d GPS below $10K, you use that to your advantage to try to force competitors out of business.
|

10-07-2018, 02:50 PM
|
|
|
|
Join Date: Sep 2018
Location: Berryville, VA
Posts: 6
|
|
Check Trio Site
In the AFM for the Trio (which required FAAApproval) it states not approved for coupled approaches or operation below 500 ft AGL.
|

10-07-2018, 03:17 PM
|
|
|
|
Join Date: Dec 2011
Location: Livermore, CA
Posts: 6,797
|
|
Mis-information
Quote:
Originally Posted by TCB
In the AFM for the Trio (which required FAAApproval) it states not approved for coupled approaches or operation below 500 ft AGL.
|
You’re looking in the wrong place. The sub-section on the Trio web site dealing with installation in normally certified aircraft via STC but no TSO has these limitations. The Trio sold for EAB aircraft has no such limitations, nor is there any ‘faa approved afm’.
Last edited by BobTurner : 10-07-2018 at 03:25 PM.
|

10-07-2018, 03:50 PM
|
|
|
|
Join Date: Sep 2018
Location: Berryville, VA
Posts: 6
|
|
Sorry, but in my book when in IMC using a piece of equipment not approved/certified and with a specific exclusion of use in IMC, even if it can be interpreted as only for a certified aircraft, it should not be used for the excluded function even in an EAB. Doesn't matter if the exclusion is for only certified airframes. I'm the guy that is not risk averse with regards to minimum ceiling/visibility approaches, but I am risk averse with my navigation equipment capabilities. When the piece of avionics equipment is not authorized for certain functions in a cetertified aircraft why would it be safe to rely on those functions in an EAB? Notice there is not an Approach mode in the Trio? Your risk profile may be totally different from mine.
|

10-07-2018, 04:41 PM
|
|
|
|
Join Date: Dec 2011
Location: Livermore, CA
Posts: 6,797
|
|
Quote:
Originally Posted by TCB
Sorry, but in my book when in IMC using a piece of equipment not approved/certified and with a specific exclusion of use in IMC, even if it can be interpreted as only for a certified aircraft, it should not be used for the excluded function even in an EAB. Doesn't matter if the exclusion is for only certified airframes. I'm the guy that is not risk averse with regards to minimum ceiling/visibility approaches, but I am risk averse with my navigation equipment capabilities. When the piece of avionics equipment is not authorized for certain functions in a cetertified aircraft why would it be safe to rely on those functions in an EAB? Notice there is not an Approach mode in the Trio? Your risk profile may be totally different from mine.
|
Since I see by your low post count, forgive me if I assume you’re not up to date on EAB instruments and history. For years the FAA would absolutely not approve any non-TSO’d device in a normally certified aircraft. Now, they’re cautiously taking baby steps. Some non-TSO EFIS units may now be used - but only for the AI function, nothing else. Similarly they have limited the use of non-TSO’d autopilots. For the last (what? Ten years?) the majority of EAB aircraft built for ifr have non-TSO’d flight instruments, non-TSO’d CDI’s, non-TSO’d autopilots. Now non-TSO’d GPS’s are appearing in ADSB-out boxes. There is no evidence that these devices are less safe than TSO’d devices, which is exactly why the faa is now allowing them in normally certified aircraft. In fact, compared to flying behind a vacuum driven AI/DG, I consider my non-TSO’d flight instruments to be an improvement. As to the Trio, it is perfectly capable of flying GPS LPV approaches. Connected to an EFIS, it will fly ILS approaches as well.
Edit: I see I forgot to address your comment about ‘approach mode’. In the old days, even TSO’d autopilots weren’t that good, and you had to choose between ‘enroute mode’ (where the autopilot would allow significant cdi deviations but smoothly correct them) or ‘approach mode’ (where deviations were promptly corrected, but with more frequent turning and banking). Modern autopilots are so good that this distinction is lost.
Last edited by BobTurner : 10-07-2018 at 06:48 PM.
|

10-07-2018, 08:02 PM
|
|
|
|
Join Date: Sep 2018
Location: Berryville, VA
Posts: 6
|
|
Your forgiven, as I've only been flying for 42 years, instrument rated for 36 years, worked on navaids and avionics as well as other electronic items in the military, currently fly with dual G5s, GTN 650, GTX 345 and dual KX 155s w/GS for backup. Recently joined here to decide if I wanted to build an RV in the shed out back. As an EAA lifetime member, I'm very familiar with TSO/non-TSOed equipment, the ability of a EAB plane to use a multitude of non approved the EAA effort to obtain STCs for non certified items for use in certified airframes and the NORSEE efforts. Still it's my approach that I would not use a safety of flight item that had a specific functional exclusion for a certified aircraft in the STC for that function in an EAB. Now that's my opinion, and I'm aware that yours is different. This thread is supposed to be about GTN 650 issues.
|

10-08-2018, 08:34 AM
|
 |
|
|
Join Date: Sep 2010
Location: Olathe, KS
Posts: 2,885
|
|
Quote:
Originally Posted by BobTurner
I think your problem may be related to the format change in the new software. Your Trio may be unable to read the new arinc format (Garmin 429). I too wish everyone would play quietly together, but that?s not the real world. In the real world, if you are the sole source of TSO?d GPS below $10K, you use that to your advantage to try to force competitors out of business.
|
We know the nice folks at Trio pretty well, and we certainly didn't create new GTN software in an attempt to put them out of business.
Some facts: - Garmin developed a new GTN VNAV feature that many customers have requested, and gives it away to all new and existing GTN owners.
- The new GTN software is on our website so EAB owners can install it themselves and avoid any potential labor fee from dealers to install the free software.
- The new GTN software keeps the old ?GAMA Format 1? ARINC 429 format when the new VNAV capable ?Garmin 429? format was added to make sure and retain compatibility with existing equipment.
- While the new "Garmin 429" format contains some additional labels that support VNAV, all of the old "GAMA Format 1" labels are still present, so if an existing device ignores labels that it doesn't need, it should be fine using either "GAMA Format 1" or "Garmin 429" format.
We welcome swordtail or PAFlier to contact us directly by phone or email shown below if we can help in any way.
Thanks,
Steve
__________________
Garmin G3X Support
g3xpert@garmin.com
1-866-854-8433 - 7 to 7 Central Time M to F
Please email us for support instead of using Private Messaging due to the limitations of the latter.
|

10-08-2018, 03:32 PM
|
|
|
|
Join Date: Oct 2011
Location: Grindstone, PA
Posts: 143
|
|
Thanks for all the help. My problem is related to the magnetometer. I called and talked with a tech at Garmin.
|

11-19-2018, 04:20 PM
|
 |
|
|
Join Date: Aug 2005
Location: McKinney, TX
Posts: 52
|
|
VNAV Unavailable msg
I recently installed GTN 650 ver 6.51 and now I too am getting the "VNav Unavailable" msg. Might someone be willing to share how to go about specifying 'VCALC'?
Thanks in advance..
__________________
Dick Flunker
RV-6A, 2000 hours
North Texas
|

05-07-2019, 10:14 AM
|
|
|
|
Join Date: Feb 2013
Location: Panama
Posts: 6
|
|
I have the same problem here - I just called Garmin and they refuse to tell me. It's just one setting. Anyone able to advise?
|
| Thread Tools |
Search this Thread |
|
|
|
| Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -6. The time now is 04:56 AM.
|