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20 Jan 2018, 20:57 [ UTC - 5; DST ]


Greenwich AeroGroup



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 Post subject: Re: GDL82 $1795 ADSB
PostPosted: 25 Jul 2017, 11:41 
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Joined: 03/15/08
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Location: Loveland, CO
Aircraft: 35C-33
There needs to be some sort of set up port or procedure on this or maybe even a wiring jumper to tell the ground what frequencies your IN devices are listening on for traffic.

BH


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 Post subject: Re: GDL82 $1795 ADSB
PostPosted: 26 Jul 2017, 08:49 
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Location: Santa Barbara, CA
Aircraft: '76 A36 TAT TN 550
Had I known this unit was coming I would have kept my KT-76A (new in 99 I think, beautiful condition, worked flawlessly).

Instead I went with full ADS-B out with the Avidyne AXP 340.

This unit is a game changer for those looking for ADS-B Out compliance at a modest cost.

Garmin will sell a lot of them.

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 Post subject: Re: GDL82 $1795 ADSB
PostPosted: 26 Jul 2017, 11:47 
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Location: Loveland, CO
Aircraft: 35C-33
My snoop at KOSH has info from a draft installation document -- no copies or photos, please.

Items from those discussions:

1) 1.5 db loss on transponder power-- so your installation needs enough margin to take that hit. Typical KT-76 setup would be fine.

2) Optional light to tell box is working

3) No breaker size spec yet

4) Optional switch for anonymous mode off - on ; or wire one way or the other

5) Not clear how they configure to tell ground where to send IN information (I'm sending her back for more on this one tho there is some TBD)

6) STC would not have an AML. Would cite mode C setup. (Trying to impress on them NOT to require a field approval!!)

So a question I would have: Why would you want anonymous mode ever turned off? Seems like the waste of a switch and a wire.

BH


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 Post subject: Re: GDL82 $1795 ADSB
PostPosted: 26 Jul 2017, 20:23 
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Username Protected wrote:
Navworx no longer enjoys an outstanding value proposition.


'Outstanding' is a relative term, but the Out-only GDL82 for $1800 plus the new portable GDL52 ADS-B In receiver for $1150, comes to about $2950 in my book.

NavWorx is selling it all in one box for $2020.

It seem like there is still some value to be had.


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 Post subject: Re: GDL82 $1795 ADSB
PostPosted: 27 Jul 2017, 08:31 
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Joined: 11/25/11
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Location: KGNF, Grenada, MS
Aircraft: A*, Cub, C-180
It is 978 mhz. If, I wanted to take the 180 to Alaska next summer, would that suffice to get me through Canadian airspace?

Jgreen

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 Post subject: Re: GDL82 $1795 ADSB
PostPosted: 27 Jul 2017, 09:44 
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Username Protected wrote:
It is 978 mhz. If, I wanted to take the 180 to Alaska next summer, would that suffice to get me through Canadian airspace?

Jgreen


What transponder do you have now?


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 Post subject: Re: GDL82 $1795 ADSB
PostPosted: 27 Jul 2017, 09:58 
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Location: S Sioux City, NE (7K8)
Aircraft: 1988 Bonanza F33A
Username Protected wrote:
It is 978 mhz. If, I wanted to take the 180 to Alaska next summer, would that suffice to get me through Canadian airspace?

Jgreen

No mandate anywhere next summer so it won't matter.

That said, I think only USA is deploying 978 ground stations and if you want anything through Canada it will be XM or internet based weather and if I wanted traffic I'd have active traffic.

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Bob


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 Post subject: Re: GDL82 $1795 ADSB
PostPosted: 27 Jul 2017, 14:15 
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Username Protected wrote:
So a question I would have: Why would you want anonymous mode ever turned off? Seems like the waste of a switch and a wire.
BH


Hello Bill,

When discussing GDL 82 anonymous mode with customers at Oshkosh this week, one reason came up for installing the switch.

People sometimes use the Flight ID shown on the traffic or map page to identify someone for whom you are going to rendezvous with in the air.

Anyone with GDL 82 anonymous mode enabled transmits a pseudo random 24 bit ICAO code (different on each power-up) and a Flight ID of "VFR".

If you had a switch on the panel, you could temporarily take it out of anonymous mode so the aircraft joining you could see your Flight ID (N-Number) on their traffic map/page. After joining up, you could then flip the switch to set your Flight ID back to "VFR" if you wished.

On a humorous note, over-and-over customers were shocked and amazed that the regulatory authorities let the GDL 82 operate in this anonymous mode.

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Steve


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 Post subject: Re: GDL82 $1795 ADSB
PostPosted: 27 Jul 2017, 15:00 
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Username Protected wrote:
On a humorous note, over-and-over customers were shocked and amazed that the regulatory authorities let the GDL 82 operate in this anonymous mode.


Don't give them any ideas!

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 Post subject: Re: GDL82 $1795 ADSB
PostPosted: 08 Aug 2017, 14:45 
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Location: Olathe, KS.
Hello everyone,
I've had a number of questions posed to me since Oshkosh on if there will be an AML or what airframes. We are receiving initial airworthiness via the GDL 82 Mooney STC. Then using this initial airworthiness approval (STC) and the FAA Memorandum “Installation Approval for ADS-B OUT Systems” (attached), the customer will be able to install the GDL 82 in any Part 23 aircraft as a minor alteration. They will still be required to fill out and submit a FAA Form 337. In accordance with the FAA Memorandum, the form 337 can be submitted directly without FAA approval.

Let me know if there are any other questions,


Please login or Register for a free account via the link in the red bar above to download files.

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Trek A. Lawler
Supervisor, Garmin Aviation Field Service Engineering
Aviation Product Support


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 Post subject: Re: GDL82 $1795 ADSB
PostPosted: 08 Aug 2017, 16:07 
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Username Protected wrote:
Is the STC available to view? Anyone have a link? My A/P is wanting to read it. He thinks it's to good to be true.


Sorry Michael,
no, there is no data available as of yet. I just received a draft copy of it for review today and will be happy to answer any questions.


Trek

I have a question. My friend is in the process of upgrading his panel (172RG) and would like to get the GDL-82 when it becomes available. He wants to take the opportunity to put in the hooks for installing the GDL-92 as painless as possible.

The sales brochure that I have seen, seems to show the GDL-82 mounted in the belly of the aircraft (high wing) close to the transponder antenna.

Is this a requirement or can it be installed anywhere, say above the glove box next to the radio stack?

In other words, is there a maximum length of RG-400 between the output of the GDL-82 to the transponder antenna?

Gene

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 Post subject: Re: GDL82 $1795 ADSB
PostPosted: 08 Aug 2017, 23:18 
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Username Protected wrote:
Trek

I have a question. My friend is in the process of upgrading his panel (172RG) and would like to get the GDL-82 when it becomes available. He wants to take the opportunity to put in the hooks for installing the GDL-92 as painless as possible.

The sales brochure that I have seen, seems to show the GDL-82 mounted in the belly of the aircraft (high wing) close to the transponder antenna.

Is this a requirement or can it be installed anywhere, say above the glove box next to the radio stack?

In other words, is there a maximum length of RG-400 between the output of the GDL-82 to the transponder antenna?

Gene


Hello Gene,
there are some specific requirements for mounting the unit and it willb e recommended to install it as close to the "L" band transponder as possible. the GDL 82 will introduce no more then 1.5 dB of additional cable loss so if these are old installs that are using a higher loss cable it is recommended to replace the coax with RG 400 or RG 393. but there are no requirements on where to mount the unit. if the system has very low loss on initial checkout the unit can be mounted behind the panel. it all depends on the quality of the existing system.

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Trek A. Lawler
Supervisor, Garmin Aviation Field Service Engineering
Aviation Product Support


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 Post subject: Re: GDL82 $1795 ADSB
PostPosted: 09 Aug 2017, 12:10 
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Aircraft: Cessna R182
Thanks very much Trek. The transponder is a GTX327 with a 7-foot run of RG-400 to the antenna. Seven feet of RG-400 is about 1.47 db loss @ 1 GHz.

One more question, since the GDL-82 has a built in GPS, will it need a "Keep Alive" (always hot) power wire? Or has Garmin improved the system by using Non-Volatile Memory (NVM)?

Gene


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 Post subject: Re: GDL82 $1795 ADSB
PostPosted: 10 Aug 2017, 09:51 
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Username Protected wrote:
Thanks very much Trek. The transponder is a GTX327 with a 7-foot run of RG-400 to the antenna. Seven feet of RG-400 is about 1.47 db loss @ 1 GHz.

One more question, since the GDL-82 has a built in GPS, will it need a "Keep Alive" (always hot) power wire? Or has Garmin improved the system by using Non-Volatile Memory (NVM)?

Gene


Hello Gene,
no, there is no keep alive voltage needed for the install of the GDL 82.

DYI, my previous post should have said to mount the GDL as close to the "L" band transponder antenna, but with your short run of RG 400 I don't see any cable loss issues.

_________________
Trek A. Lawler
Supervisor, Garmin Aviation Field Service Engineering
Aviation Product Support


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 Post subject: Re: GDL82 $1795 ADSB
PostPosted: 10 Aug 2017, 10:07 
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Joined: 07/15/11
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Location: Owensboro, KY (KOWB)
Aircraft: 1957 Bonanza H35
Trek, when will the unit be available to purchase? And if I understand you right, there will not be an STC with this unit?


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