ADSB-Out . . Creeping toward 2020

[Gilbert Pierce]

I see the GDL82 requires a squat/airspeed switch to disable the unit on the ground.
It is not included in the kit. I WAS WRONG-NOT REQUIRED. COZZMO81 is correct. See next post.


Evidently this is not required for Part 121 operations. When FEDEX is warming up on the ground at MEM you cannot se the airport on ForeFlight because of the stationary traffic signals.

KEEP WATCHING AND REMEMBER THE NAVWORX PROBLEM: approved and shipped and then the FAA changed its mind.

From Aircraft Spruce
Has the Garmin GDL-82 received final approval for installation from the FAA, the Garmin website does not make that clear?
The Garmin GDL 82 has not yet received final approval. The units will be shipping as soon as that is complete, which is expected this month.

What does the 10 harness option include? Just a 10ft power/ground cable, or the required GPS Antenna to GDL82 cable, and Transponder Antenna to GDL82 cable as well.
The GDL82 harness includes - power/ground, RS232, USB dongle, anonymous mode, and squat switch provisions. It does not include an antenna cable.

[cozzmo81]

The way I read the install manual and the wiring diagram it looks like the squat switch is optional equipment. Under the system configuration section it says under Stall Speed to "Set the stall speed for air/ground determination to the value of aircraft landing configuration stall speed (Vs0)." I am guessing the software is using this value to turn on and off the unit. There is a Note number 9 on the wiring diagram that says OPTIONAL INSTALLATION: THESE INPUTS MUST BE CONFIGURED IF INSTALLED. REFER TO SECTION 7 FOR CONFIGURATION SETTINGS.

[Jim Hann]

I see the GDL82 requires a squat/airspeed switch to disable the unit on the ground.
It is not included in the kit

I do not understand why the FAA requires this. What is so difficult about disabling the transmitter if the GPS shows no speed? I can’t type an address into my wife’s car navigation system if the GPS tells the system the car is moving.

Evidently this is not required for Part 121 operations. When FEDEX is warming up on the ground at MEM you cannot se the airport on ForeFlight because of the stationary traffic signals.

Gilbert, my GTX335 doesn't have a switch but it (allegedly) knows when I'm on the ground. I have the install manual and helped the IA with the programming, I'll see what it says. It isn't just FedEx that shows on the ground because I see everybody on the ground at KSTL.

Jim


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[Jim Hann]

Just picked up the plane that was in the shop for GPS/ADS B In/Out upgrade. Flew a bit and called Center and asked if they were ADS B Capable and if so could we get a verification of
our transmission. They said sure they could. but it would be 10 minutes or so because they had to turn it on first. 2020 may not be as close as we think.

Old comment but I had some "movement" on this. STL approach doesn't seem to use it but the non Class B towers in the area I've talked to apparently see it on their BRITE scope. I always say "Pacer" on the radio but they always say "Tri-Pacer" since that is what the FAA code is for my airplane.


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[Gilbert Pierce]

Gilbert, my GTX335 doesn't have a switch but it (allegedly) knows when I'm on the ground. I have the install manual and helped the IA with the programming, I'll see what it says. It isn't just FedEx that shows on the ground because I see everybody on the ground at KSTL.

Jim


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Jim, is your GTX335 ADSB-out compliant? I know all of the ADSB-out units Steve has installed required an airspeed switch.

The reason I called out FEDEX is because the only class B or C airport I go near is Fedex International Airport at Memphis

[Jim Hann]

Jim, is your GTX335 ADSB-out compliant? I know all of the ADSB-out units Steve has installed required an airspeed switch.

The reason I called out FEDEX is because the only class B or C airport I go near is Fedex International Airport at Memphis

According to the manual it is and the Feds gave me the $$$


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[Gilbert Pierce]

I wonder if Garmin just shuts its traffic off the sensible way on this unit; no gps speed it is on the ground. Duh!

[Jim Hann]

Multiple places in the manual deal with it but here is the most definitive answer.



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[Gilbert Pierce]

Aircraft Spruce says no airspeed switch is required. I re-read the installation manual and they are correct.There are provisions for it if you want one. My goof.

[Steve Pierce]

I am curious about the airspeed switch. I was told by an FAA engineer it was a requirement. I know it is a part of the STC on the Trig transponders. I will have to investigate this further.