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cjhukill(at)cox.net
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 Posted: Thu Jun 14, 2007 5:42 am Post subject: ADI Pilot |
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Last week I posted a question about my non working G/S in my newly installed upgraded RV8 panel. Thanks for all the suggestions!. Bob Archer said I might be "loosely connected" as the problem. Rather than take offense at this, I asked for an explanation, and he said the BNC center pin may not be fully seated in the connector. Well the only connector that was not installed on the bench, but rather behind the panel, sure enough was loosely connected, a result of the difficult access. After changing that out, the system works perfectly, that is the wingtip antenna, with splitter to the G430 VLOC and G/S has a nice strong signal.
NOW for the really good news. It turns out the TruTrak ADI pilot autopilot not only flys the GPS approaches just fine, but it flys the ILS localizer right down the center of the runway. Of course it's really flying the GPS overlay, but it's the same course, with the same accuracy. The CDI shows you the LOC, but the ADI Pilot looks at the GPS. This is perfectly legal to do despite the fact that the TruTrak people told me it wouldn't fly a GPS approach without roll steering. Of course they are talking a full procedure turn, or holding pattern entry, but for vectors to final it'll do the job. So anyone on a tight budget might want to consider this (G430 and ADI Pilot) solution as a very capable "punch the summer stratus" system.
Chris Hukill
Back to work on the 10
[quote][b]
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dmasys(at)cox.net
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| Posted: Thu Jun 14, 2007 10:03 am Post subject: ADI Pilot |
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I have a TruTrak Digiflight 2 with GPS steering connected to a UPS GX60 approach certified GPS, and also an SL30 in the panel of my -7A. I commonly fly the GPS overlay on the ILS to my home airport, while watching the ILS needles from the SL30, and I think you will find that the GPS guidance isn't always down the centerline, but always close enough when you break out (even at minimums) so that you can make a normal landing. GPS retains whatever its native error is at all positions in the approach path, whereas the ILS course guidance gets more precise as you approach decision height.
Not a big deal for most approaches but it can be a bit disconcerting the first time you descend through a low overcast flying an ILS overly and break out expecting to see the "rabbit" lights directly in front of you, but instead they are off to one side or the other.
-Dan Masys
40448 paint - (yuk  )
---- Chris Hukill <cjhukill(at)cox.net> wrote:
| Quote: | NOW for the really good news. It turns out the TruTrak ADI pilot autopilot not only flys the GPS approaches just fine, but it flys the ILS localizer right down the center of the runway. Of course it's really flying the GPS overlay, but it's the same course, with the same accuracy. The CDI shows you the LOC, but the ADI Pilot looks at the GPS. This is perfectly legal to do despite the fact that the TruTrak people told me it wouldn't fly a GPS approach without roll steering. Of course they are talking a full procedure turn, or holding pattern entry, but for vectors to final it'll do the job. So anyone on a tight budget might want to consider this (G430 and ADI Pilot) solution as a very capable "punch the summer stratus" system.
Chris Hukill
Back to work on the 10
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cjhukill(at)cox.net
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| Posted: Fri Jun 15, 2007 3:19 pm Post subject: ADI Pilot |
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I'll certainly be on the lookout for that inaccuracy, however I wonder if the fact my G430 is WAAS makes a difference in the accuracy. I've only flown 3 practice ILS (GPS overlay)approaches and both were exactly on centerline with a ten knot crosswind. I'll continue to experiment at different approaches (in VMC) until I know just how good it is, but for now I think the ADI coupled approaches are better than my hand flown raw data ILSs
Chris Hukill
do not archive
[quote][b]
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glastar(at)gmx.net
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| Posted: Sat Jun 16, 2007 8:43 am Post subject: ADI Pilot |
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Chris,
you're telling that the ADI flyes the horizontal but you still fly
manually the vertical right=?
br Werner
Chris Hukill wrote:
| Quote: | I'll certainly be on the lookout for that inaccuracy, however I wonder
if the fact my G430 is WAAS makes a difference in the accuracy. I've
only flown 3 practice ILS (GPS overlay)approaches and both were
exactly on centerline with a ten knot crosswind. I'll continue to
experiment at different approaches (in VMC) until I know just how good
it is, but for now I think the ADI coupled approaches are better than
my hand flown raw data ILSs
Chris Hukill
do not archive
*
*
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