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GFC500 Update


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22 hours ago, 201Mooniac said:

Those models are listed as beginning in the next 12 months. 

https://buy.garmin.com/en-US/US/p/604257#additional

My bad. I assumed when you said they are "in the works" that you actually meant they were actively doing something about it and not just "planning" to do something about it. Because it has said the same thing almost a year ago.

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12 minutes ago, 59Moonster said:

My bad. I assumed when you said they are "in the works" that you actually meant they were actively doing something about it and not just "planning" to do something about it. Because it has said the same thing almost a year ago.

I wasn't the one who said that but just posting the latest status.  I don't think there is any reasonable expectation of a date when it is listed in the future category.

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  • 1 month later...
8 minutes ago, MooneyBe said:

Has anyone on this thread installed the GFC500 with a G500 (not Txi--the original G500)? It's frustrating but it seems like even with the G500 you still need to install the G5 backups and associated GAD29 interface. 

Even the TXI doesnt run the attitude portion of the GFC500. You need a G5, Gi275, or a G3X. No exceptions.

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47 minutes ago, MooneyBe said:

Has anyone on this thread installed the GFC500 with a G500 (not Txi--the original G500)? It's frustrating but it seems like even with the G500 you still need to install the G5 backups and associated GAD29 interface. 

That's actually a good thing.  Switch off the G500/G500Txi and you still have your autopilot without Heading (unless you installed an extra GMU 11 with the G5).  I've tested it and it works perfectly.

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19 hours ago, donkaye said:

That's actually a good thing.  Switch off the G500/G500Txi and you still have your autopilot without Heading (unless you installed an extra GMU 11 with the G5).  I've tested it and it works perfectly.

Yes, and thanks to Don, now mine does as well.  Only issue is if the backup G5 fails, you lose your AP even though you still have your TXi.  Oh well, guess I need a second G5 :-)

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Yes, and thanks to Don, now mine does as well.  Only issue is if the backup G5 fails, you lose your AP even though you still have your TXi.  Oh well, guess I need a second G5 :-)

I know you were joking, but given the cost of TXI vs G3X, you’re already spending 35+ AMUs, what’s another 2 AMUs? Plus if TXi goes south, you have backup of attitude, AP, and navigation ability.


Tom
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7 minutes ago, ArtVandelay said:


I know you were joking, but given the cost of TXI vs G3X, you’re already spending 35+ AMUs, what’s another 2 AMUs? Plus if TXi goes south, you have backup of attitude, AP, and navigation ability.


Tom

Yes, I did think about that but it is panel space more than cost that stopped me.  If the TXi goes south, the single G5 already provides backup of attitude and navigation.  The second G5 would only get me a backup of the AP.  Now if the G5 or GI-275 could provide a backup to the AP while also providing EIS, that would be a winner for me.  I checked with Garmin and the GI-275 if used as EIS can not drive the GFC-500 so it can't provide the backup. 

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On 11/11/2020 at 5:25 PM, MooneyBe said:

Roger that. I'm looking at ~22.5k quote all-in for the GFC500, G5, and GAD (install estimated at ~10k), which is tough to stomach given my KFC was doing great until the computer fried. 


@MooneyBe, Does that price include any removed instruments or components factored in trade?

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On 11/11/2020 at 5:21 PM, donkaye said:

That's actually a good thing.  Switch off the G500/G500Txi and you still have your autopilot without Heading (unless you installed an extra GMU 11 with the G5).  I've tested it and it works perfectly.

Don, right now I have the MAG500 dedicated heading input to the ESI500.  Will the GMU11 provide that same dedicated functionality to the GI275?

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1 hour ago, StevenL757 said:

Don, right now I have the MAG500 dedicated heading input to the ESI500.  Will the GMU11 provide that same dedicated functionality to the GI275?

Yes.  When I had the ESI 500, which was a great backup,  I chose not to have the MAG500, but got heading from the G500 GMU 11.  I didn't want to always have the 2 headings not align by a few degrees.  In the unlikely event that the basic PFD fails, the reversion to TRK works just fine for the short amount of time necessary to get on the ground and have the main unit repaired.

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  • 2 months later...
On 3/14/2020 at 5:37 AM, bradp said:

unless you’re coming from a BK autopilot there won’t be enough space on your yoke for the required trim switch and AP disconnect button. I wasn’t about to spend $500 for an out of stock plastic piece of unobtanium, so I fabricated a one-off that works perfectly.  If I had a 3D printer this would have been a great application.   
 

Can someone--perhaps @Bradp--speak to this? I'm struggling to find a requirement to locate these on the yoke.

Here is the problem: with a stock 67 C yoke it's impossible to do...

I have looked at the FAR's (and STC's as far as I can) to locate the requirement.

Don't get me wrong, I'm happy to be shown the regulation, but haven't found it yet.

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32 minutes ago, vorlon1 said:

Can someone--perhaps @Bradp--speak to this? I'm struggling to find a requirement to locate these on the yoke.

Here is the problem: with a stock 67 C yoke it's impossible to do...

I have looked at the FAR's (and STC's as far as I can) to locate the requirement.

Don't get me wrong, I'm happy to be shown the regulation, but haven't found it yet.

I don’t think you’ll find it in the regs. But there is some language in the STC install manual that pretty much states where the AP disco and TOTO switches reside, then shops interpret that within reason.  I haven’t personally laid eyes on that STC install manual.  @Baker Avionics can probably give us some insight.  For practical purposes, @kpaul I think has a vintage style yoke so should be able to let us know how they did it with that particular setup. 

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Just now, bradp said:

I don’t think you’ll find it in the regs. But there is some language in the STC install manual that pretty much states where the AP disco and TOTO switches reside, then shops interpret that within reason.  I haven’t personally laid eyes on that STC install manual.  @Baker Avionics can probably give us some insight.  For practical purposes, @kpaul I think has a vintage style yoke so should be able to let us know how they did it with that particular setup. 

Also you should be able to locate trim on the left horn along with ptt and disco on the right horn.  Unless the STC says something impractical. 

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Here is what the GFC-500 STC install manual has to say about switches:

 

3.4.5 Switches

The GFC 500 requires the installation of an autopilot disconnect switch on the pilot’s flight controls. If the GFC 500 installation includes manual electric trim, the installation of a trim switch on the pilot’s flight controls is also required. See Section 3.2 for switch part number.

The switch installation must meet the following criteria;

  • Must be within easy reach of one or more fingers/thumb of the pilot’s left hand, when the hand is in a position for normal use on the pilot’s flight controls

  • Must be easily located by the pilot without visual reference

  • Must be located so that any action to operate switch will not cause an unintended input

    to the aircraft flight controls

  • Must be located to minimize inadvertent operation and interference from other nearby

    switches or devices

  • For aircraft without Pitch Trim installed, the Autopilot Disconnect switch must be labeled

    AP DISC.

  • For aircraft with Pitch Trim installed, the Autopilot Disconnect switch must be labeled AP

    DISC/TRIM INT.

  • The Trim Switch must be labeled TRIM and the directions must be labeled UP and DOWN (or DN).

  • Switches must be clearly labeled as defined in Section 3.4.7
    The installation of these switches may require that the installer fabricate a bracket. If a bracket

    must be fabricated, the bracket installation must meet the following criteria;

  • Must not interfere with the pilot’s hand when in a position for normal use on the pilot’s flight controls

  • Must not obstruct the pilot’s view of any instrumentation or annunciations

  • Must be rigid enough to prevent deformation under normal operation of the installed

    switches

  • Must not interfere with other nearby switches or devices

  • Must be fabricated from metal with no sharp edges

  • The installation must be treated as if it were a structural repair and completed in

    accordance with AC 43.13-1B chapter 4, section 4.

    Installer is responsible for approval of any modification of the pilot’s flight controls and any needed brackets. Figure 3-1 shows the GFC 500 switches mounted in the left handle of a control wheel, this method is preferred when possible. Figure 3-2 shows examples of alternative methods for mounting the control wheel switches using a field fabricated bracket.

Installation of the GFC 500 Autopilot also requires a Go Around switch. See Section 3.2 for switch part number. The installation of the Go Around switch must meet the following criteria;

  • Must be within easy reach of the hand that normally operates the throttle

  • Must be easily located by the pilot without visual reference

  • Must be located so that any action to operate switch will not cause an unintended input

    to the aircraft flight or engine controls

  • Must be located to minimize inadvertent operation and interference from other nearby

    switches or devices

  • Switch must be clearly labeled “GO AROUND” as defined in Section 3.4.77

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9 hours ago, pirate said:

Not sure if your yokes are like mine but this is how I’d did my 70C yoke switches for my Stec-30. 
 

35D4FC39-109F-427B-87E5-D7036C054254.thumb.png.41cf03f0badc5585eff9db1458661f7e.png

 

I looked around for the installation doc and couldn't find it. Thanks.

My yoke is like yours. This is a good, and probably best, solution with two issues the way I see it.

1: The trim switch. It sounds like section 3.2 call out a specific 'rocker' type? It infers a specific part number. (is this included?) Would it be possible to mount it on a plate like this, or would two separate (one for up one for down) switches acceptable under section 3.2? 

2: Like many people, I put a tablet between the yoke horns like kpaul above.

Bottom line is it's a real bummer modern yokes are hard to find and $$$. :blink: Looks like I might even have to consider getting a field approval.

Thanks all.

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When I installed electric trim we made another bracket for the yoke (pictured) so the electric trim can be operated with left thumb like the auto pilot switches. 

Im also able to use a iPad mini on the yoke with no interference. 

Since these pictures I ran the wires up the yoke. 

I would think a bracket for your trim switches can be easily made. 
 

3A817607-F21F-472A-82A5-6BADCDC24AC9.png

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On 11/11/2020 at 5:21 PM, donkaye said:

That's actually a good thing.  Switch off the G500/G500Txi and you still have your autopilot without Heading (unless you installed an extra GMU 11 with the G5).  I've tested it and it works perfectly.

The gi275 has its own heading via GMU11 

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15 hours ago, jetdriven said:

The gi275 has its own heading via GMU11 

Same thing as the G5.  I chose not to install the GMU 11. because during normal flight operations there would be a difference between the GMU 11 of the G5 and the GMU 44 of the TXI.  For the rare time that the TXi failed track would be adequate to run an approach and get on the ground.

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