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09-27-2018, 01:01 PM
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Join Date: Mar 2014
Location: Bratislava, Slovakia
Posts: 203
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Thanks Levi!
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Igor
RV-10 in progress
Build Log
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09-27-2018, 02:58 PM
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Join Date: Apr 2013
Location: SoCal
Posts: 239
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Is there any way to insert crossing restriction altitudes for flight plan fixes?
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09-27-2018, 03:30 PM
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Join Date: Mar 2006
Location: Newport, TN
Posts: 7,496
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Quote:
Originally Posted by smt6
Is there any way to insert crossing restriction altitudes for flight plan fixes?
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This is detailed in the GTN ver 6.50 manual supplement.
http://static.garmin.com/pumac/190-01004-19_A.pdf
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09-27-2018, 07:58 PM
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Join Date: Oct 2014
Location: Milwaukee, WI
Posts: 300
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Any chance you guys (Garmin) have made a video showing the VNAV descent usage on the GTN/G3X system yet?
I found the other quick how-to videos extremely useful. I haven't flown our plane in a few months so I'm having a hard time visualizing how to do this.
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Matt
CFI / RV-10
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09-27-2018, 08:23 PM
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Join Date: Apr 2013
Location: SoCal
Posts: 239
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Quote:
Originally Posted by Brantel
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I don?t have a GTN
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09-28-2018, 05:50 AM
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Join Date: Mar 2006
Location: Newport, TN
Posts: 7,496
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Quote:
Originally Posted by smt6
I don’t have a GTN
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All of this new VNAV stuff being discussed here is GTN enabled by the latest firmware revisions. The built in G3X Touch VNAV function is pretty basic. Similar to what is included in the Garmin handheld GPS units.
Check out page 79 of the user manual for the VNAV function and page 306 for how it can be used with the Garmin AFCS (Autopilot/Flight Director).
http://static.garmin.com/pumac/190-01754-00_K.pdf
Last edited by Brantel : 09-28-2018 at 05:55 AM.
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09-30-2018, 06:45 AM
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Join Date: Nov 2014
Location: Concord, NH
Posts: 215
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Sloppy Auto pilot turns
I completed the recent upgrade to both GTN625 and G3X. Upgrade installs went fine, all seems to work as before except autopilot tracking in turns. Just completed a long IFR cross country and every time the course changed more than a few degrees on the heading the GSA 28 autopilot turned too late to make a smooth turn. It over-turned (banked to late) and had to turn back sharply to regain the course track. All this turning caused me to lose altitude and I had to disengage the autopilot on two or three occasions to get back on course.
Never had this issue prior to the updates. Is the any settings to adjust in either the GTN or G3X that will fix this?
Steve
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Steve Briggs. RV9, G3x, G5, VPX, GTN625, PMags, A&P, IA, ATP-CFII
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09-30-2018, 07:34 AM
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Join Date: Sep 2010
Location: Olathe, KS
Posts: 2,885
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Quote:
Originally Posted by sibriggs
I completed the recent upgrade to both GTN625 and G3X. Upgrade installs went fine, all seems to work as before except autopilot tracking in turns. Just completed a long IFR cross country and every time the course changed more than a few degrees on the heading the GSA 28 autopilot turned too late to make a smooth turn. It over-turned (banked to late) and had to turn back sharply to regain the course track. All this turning caused me to lose altitude and I had to disengage the autopilot on two or three occasions to get back on course.
Never had this issue prior to the updates. Is the any settings to adjust in either the GTN or G3X that will fix this?
Steve
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Hello Steve,
If you were laterally coupled to the GTN on this trip, it is quite possible that your G3X system is no longer receiving roll steering guidance from the GTN and you would need to re-verify your ARINC 429 settings.
Lateral coupling doesn't have anything to do with altitude hold, so it sounds like you have autopilot adjustments that need to be made there.
It would be best to contact us directly by phone or email shown below.
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.
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10-18-2018, 06:06 PM
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Join Date: May 2005
Location: Savannah, GA
Posts: 1,301
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Quote:
Originally Posted by sibriggs
Just completed a long IFR cross country and every time the course changed more than a few degrees on the heading the GSA 28 autopilot turned too late to make a smooth turn. It over-turned (banked to late) and had to turn back sharply to regain the course track.
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Mine has always done something like this. What I think is going on (based on autopilot design courses taken 45 years ago) is that the autopilot *always* goes into course capture mode and initiates at 40 degree intercept course. Only then does it check to see what's really required, and by then, it has overshot when it goes into track mode. What should happen is that the autopilot should see if it is close enough in cross track distance and rate that it can go straight into track mode without doing the 40 degree intercept bit.
__________________
RV-9A at KSAV (Savannah, GA; dual G3X Touch with autopilot, GTN650, GTX330ES, GDL52 ADSB-In)
Previously RV-4, RV-8, RV-8A, AirCam, Cessna 175
ATP CFII PhD, so I have no excuses when I screw up
2020 dues slightly overpaid
Retired - "They used to pay me to be good, now I'm good for nothing."
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10-20-2018, 03:14 PM
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Join Date: Dec 2015
Location: Houston, Texas
Posts: 57
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Has anyone climbed using V6.5?
Example after Missed Approach.
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