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10-14-2011, 02:29 PM
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Join Date: Feb 2005
Location: Abilene, TX
Posts: 724
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User Waypoints & Approaches
This question comes from a discussion I was having with another pilot. I have little knowledge of this sort of thing so here goes:
If I had a private airstrip out in the 'boonies' somewhere, would it be possible to "build" an LNAV/VNAV, or LPV approach with user waypoints using a GNS430 (or GTN650)?
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Sam Evans
RV7-A O-360 C/S
VAF#812
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10-14-2011, 02:59 PM
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Join Date: Oct 2006
Location: Garden City, Tx
Posts: 5,122
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I looked into that once as the situation applies to my home strip - basically you can't (or at least I couldn't figure out how to) make it give vertical guidance from user waypoints. You can certainly set up a non-precision approach for it though, and have the GPS/AP fly the ground course while you control altitude manually.
Disclaimer - what we are discussing here is, of course, theoretical and not legal in actual IMC conditions, and should not be used in IMC - which is probably the precise reason they won't let the box give you vertical guidance on user waypoints.
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Greg Niehues - SEL, IFR, Repairman Cert.
Garden City, TX VAF 2020 dues paid 
N16GN flying 700 hrs and counting; IO360, SDS, WWRV200, Dynon HDX, 430W
Built an off-plan RV9A with too much fuel and too much HP. Should drop dead any minute now. 
Last edited by airguy : 10-14-2011 at 03:02 PM.
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10-14-2011, 03:32 PM
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Join Date: Feb 2005
Location: Abilene, TX
Posts: 724
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"not legal in actual IMC conditions"
Ahhh.... no wonder I couldn't find a way to assign altitude to a user waypoint. 
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Sam Evans
RV7-A O-360 C/S
VAF#812
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10-14-2011, 03:39 PM
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Join Date: Oct 2009
Location: Sydney, Aust.
Posts: 820
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If you do develop your own approach, you may be interested in the program "Final Approach" developed for the flight sim community. It'll allow you to build your own approach charts for any number of situations. Freeware download.
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Once you have tasted flight you will forever walk the earth with your eyes turned skywards, for there you have been and there you will long to return - Leonardo DaVinci
My Flickr gallery: http://www.flickr.com/photos/35521362@N06/
RV-9A - Finished on 10th February 2016 after 4 years, 9 months and 19 days! The 1020th RV-9 flying.
First flight 26th March 2016. Essential specs 145KTAS @ 2400RPM, 8000', 24.2LPH, Initial RoC 1800FPM.
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10-14-2011, 03:45 PM
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Join Date: Jan 2005
Location: Louisville, Ga
Posts: 7,840
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Yep
I have a created an approach for emergencies to my home airport with a 4 mile FAF. Our home airport doesn't have an FAA created RNAV approach yet.
The MGL 'glass' screens have the ability to create an ILS approach to a user waypoint and/or your local airport, called a GLS Approach, with vertical guidance as well!
Best,
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Pierre Smith
RV-10, 510 TT
RV6A (Sojourner) 180 HP, Catto 3 Bl (502Hrs), gone...and already missed
Air Tractor AT 502B PT 6-15 Sold
Air Tractor 402 PT-6-20 Sold
EAA Flight Advisor/CFI/Tech Counselor
Louisville, Ga
It's never skill or craftsmanship that completes airplanes, it's the will to do so,
Patrick Kenny, EAA 275132
Dues gladly paid!
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