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  #1  
Old 04-05-2021, 02:32 PM
tomww tomww is offline
 
Join Date: Jan 2015
Location: uk
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Default IFD 440 to G5 to display ILS/GS or LPV

Hi Everyone

I'm trying to work out how to use my back up G5 to give lateral and vertical guidance from my IFD440.

The G5 is a back up to my AFS5600 (an excellent system). At the moment it is a stand alone unit with no connections apart from power.

Is it possible to get an ILS/GS and or LPV display from the G5? I've looked in the G5 install manual and it looks like it will. Then I see in the user handbook that "An external navigator (i.e. GTN/GNS, GNC 255, or SL30 Nav/Comm Transceiver) must be configured to receive glideslope and/or glidepath vertical deviation indications" I don't see how that information gets back from the G5 to the IFD.

I have an AFS ARINC box. If that helps. But I'd prefer not to go through that as I want an independent back up in case of problems.

Sorry if this is a daft question. But I'm more than a bit confused.

Thanks
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  #2  
Old 04-05-2021, 03:00 PM
Dan Langhout's Avatar
Dan Langhout Dan Langhout is offline
 
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Location: Huntsville, AL USA
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You would need to use Garmin's ARINC adapter (GAD-29) to get what you want on the G5. I have a similar set up to yours (Dynon Skyview with IFD440 and a G5 backup). I connected the G5 to the IFD with RS-232/MapMX. Gives you lateral guidance but no glideslope.
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RV-7 N528DP slow build
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Last edited by Dan Langhout : 04-05-2021 at 03:08 PM.
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  #3  
Old 04-05-2021, 04:11 PM
Carl Froehlich's Avatar
Carl Froehlich Carl Froehlich is offline
 
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The G5 cannot just use a serial output from the IFD 440 to drive the G5 CDI for LOC and GS?

Carl
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  #4  
Old 04-05-2021, 04:33 PM
Dan Langhout's Avatar
Dan Langhout Dan Langhout is offline
 
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Quote:
Originally Posted by Carl Froehlich View Post
The G5 cannot just use a serial output from the IFD 440 to drive the G5 CDI for LOC and GS?

Carl
Nope, at least not from your typical GPS navigator including the IFD440. Don't know about something like an SL-30 or GNC-255.

A serial connection will get you lateral guidance - which does not get more sensitive as you move from the enroute - terminal - approach phases. You don't get vertical guidance at all.
An ARINC-429 connection is require to get all this. I might point out that this is the same on the Dynon as well. A serial connection will get you lateral guidance on the Dynon HSI but no glideslope.
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2021 =VAF= Dues PAID . . . . .
RV-7 N528DP slow build
First Flight July 26th, 2014
762 hours and counting . . . .
Now based at Moontown (3M5)
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  #5  
Old 04-05-2021, 04:44 PM
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Carl Froehlich Carl Froehlich is offline
 
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Quote:
Originally Posted by Dan Langhout View Post
I might point out that this is the same on the Dynon as well. A serial connection will get you lateral guidance on the Dynon HSI but no glideslope
Not my experience so perhaps this is an IFD-440 issue? On the first RV I ran a D10A being fed via serial from either a GX-60 for GPS, or SL-30 for VOR/LOC/ILS. No ARINC. A simple toggle switch selected the GX-60 or SL-30 serial input to the D10A. The SL-30 provided perfect LOC/GS indication on the the D10A.

So good discussion. I have been bouncing back between the D10A and the G5 for the backup EFIS on the new RV-10 (dual SkyView install). This leads me to think the D10A is the right choice.

Carl
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  #6  
Old 04-05-2021, 04:53 PM
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Walt Walt is offline
 
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The D10A is dinosaur (I'm actually surprised its still around), plus you can get the G5 + the GAD429 for less cost than just the D10A.
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  #7  
Old 04-05-2021, 05:01 PM
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Dan Langhout Dan Langhout is offline
 
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Quote:
Originally Posted by Carl Froehlich View Post
Not my experience so perhaps this is an IFD-440 issue? On the first RV I ran a D10A being fed via serial from either a GX-60 for GPS, or SL-30 for VOR/LOC/ILS. No ARINC. A simple toggle switch selected the GX-60 or SL-30 serial input to the D10A. The SL-30 provided perfect LOC/GS indication on the the D10A.

So good discussion. I have been bouncing back between the D10A and the G5 for the backup EFIS on the new RV-10 (dual SkyView install). This leads me to think the D10A is the right choice.

Carl
Not surprised the SL-30 worked. AFAIK, the SL-30 does not have ARINC and will provide it's full guidance either via old fashioned analog connections or RS-232. I would guess its replacement, the GNC-255, probably will too. No experience with the old GX-60 GPS.

Its the Garmin 430s/650s etc, and for sure the IFD440/540 (which emulate the 430/530 protocol and connection wise) that will not do this via RS-232. They only provide full lateral and GS guidance over ARINC

I don't think the D10A will help you if the data source is one of the more modern GPS/NAV/COM units.
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Dan Langhout
2021 =VAF= Dues PAID . . . . .
RV-7 N528DP slow build
First Flight July 26th, 2014
762 hours and counting . . . .
Now based at Moontown (3M5)
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  #8  
Old 04-05-2021, 05:43 PM
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Carl Froehlich Carl Froehlich is offline
 
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Quote:
Originally Posted by Dan Langhout View Post
Not surprised the SL-30 worked. SNIP

Its the Garmin 430s/650s etc, and for sure the IFD440/540 (which emulate the 430/530 protocol and connection wise) that will not do this via RS-232. They only provide full lateral and GS guidance over ARINC SNIP
Another “Garmin Value Added”. I still hold out hope we someday have other options for IFR TSO GPS navigators.

Carl
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  #9  
Old 04-05-2021, 05:52 PM
BobTurner BobTurner is offline
 
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Quote:
Originally Posted by Carl Froehlich View Post
Another “Garmin Value Added”. I still hold out hope we someday have other options for IFR TSO GPS navigators.

Carl
The radios you correctly quoted as providing full nav output via RS232 were Apollo Avionics designs. (RIP)
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