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Search: Posts Made By: snopercod
Forum: COMM Today, 10:54 AM
Replies: 67
Views: 6,921
Posted By snopercod
For the record, I measured some transponder...

For the record, I measured some transponder antennas today. From the face of the ground plane to the tip of the ball was:

1090 MHz quarter wave spike antenna = 2.43" (4.86" for half wave)
978 UAT...
Forum: COMM Yesterday, 04:32 PM
Replies: 67
Views: 6,921
Posted By snopercod
I really didn't state it correctly. The figure...

I really didn't state it correctly. The figure eight radiation pattern has nulls off the ends of the antenna - up and down in my installation. The problem I have is that the antenna is printed on a...
Forum: COMM Yesterday, 12:35 PM
Replies: 67
Views: 6,921
Posted By snopercod
OK, I got my transponder/UAT recertified today....

OK, I got my transponder/UAT recertified today. Signal strength was fine front to back, but lower (but acceptable) side to side. That's due to the figure eight radiation pattern of my half-wave...
Forum: COMM 05-22-2018, 04:02 PM
Replies: 67
Views: 6,921
Posted By snopercod
I have anonymous mode <evil grin>

I have anonymous mode <evil grin>
Forum: COMM 05-22-2018, 02:05 PM
Replies: 67
Views: 6,921
Posted By snopercod
That makes a lot of sense. That's probably the...

That makes a lot of sense. That's probably the explanation for this wacky system. Also, like you said, in 2020 the ground stations will only be needed for weather.
Forum: COMM 05-22-2018, 12:54 PM
Replies: 67
Views: 6,921
Posted By snopercod
I'm still having trouble with that. Wasn't the...

I'm still having trouble with that. Wasn't the whole idea behind this ADS-B system "free-flight" so that we no longer needed ATC radar for traffic separation? Maybe there's a technical reason for the...
Forum: COMM 05-22-2018, 11:39 AM
Replies: 67
Views: 6,921
Posted By snopercod
I just figured that out. Duh... On the map above,...

I just figured that out. Duh... On the map above, the darker areas are Radar Coverage and the light green are ADS-B coverage, both at 500' AGL. Even at 1.500' AGL where I was mostly flying, I was out...
Forum: COMM 05-21-2018, 06:10 PM
Replies: 67
Views: 6,921
Posted By snopercod
One would think that they'd be eager to show...

One would think that they'd be eager to show themselves to us "little guys", but then they mostly fly IFR and are used to ATC providing separation. I suppose this will all sort itself out in 2020...
Forum: COMM 05-21-2018, 06:07 PM
Replies: 67
Views: 6,921
Posted By snopercod
That's the way I did it, and the coax connector...

That's the way I did it, and the coax connector is facing forward. One advantage to a half-wave dipole antenna in the ADS-B world is that it receives signals equally from above and below. Mine is...
Forum: COMM 05-21-2018, 03:34 PM
Replies: 67
Views: 6,921
Posted By snopercod
Here's the ground track of my recent flight to...

Here's the ground track of my recent flight to Pickens [LQK] overlaid on the coverage map. I was a "Client" only 41% of the time. I was at 4,500' most of the way. There is a second ground station in...
Forum: COMM 05-21-2018, 03:19 PM
Replies: 67
Views: 6,921
Posted By snopercod
It might, if I knew what the colors meant. I...

It might, if I knew what the colors meant. I pinned the GBT location down at the bottom, and the Hangar location up at the top. I don't know how to get rid of all that other...
Forum: COMM 05-21-2018, 02:53 PM
Replies: 67
Views: 6,921
Posted By snopercod
Some, but many don't have it yet. This N975MD was...

Some, but many don't have it yet. This N975MD was a Citation. I went and spoke to the Captain after he landed to see what equipment he had. I was on the ground when I took this screen...
Forum: COMM 05-21-2018, 02:46 PM
Replies: 67
Views: 6,921
Posted By snopercod
Have plenty of beer on hand for the celebration!

Have plenty of beer on hand for the celebration!
Forum: Electrical Systems 05-21-2018, 02:35 PM
Replies: 8
Views: 309
Posted By snopercod
For the record, the Space Shuttle used that...

For the record, the Space Shuttle used that nickel-plated wire. I grabbed some leftover twisted, shielded pair that had been tossed in a dumpster at KSC and built it into my airplane for sentimental...
Forum: COMM 05-21-2018, 02:32 PM
Replies: 67
Views: 6,921
Posted By snopercod
One would think that the Gulfstream would be...

One would think that the Gulfstream would be ADS-B (out) equipped, but apparently not.
Forum: COMM 05-21-2018, 02:28 PM
Replies: 67
Views: 6,921
Posted By snopercod
I have always gotten the weather just fine, even...

I have always gotten the weather just fine, even without the external antenna that I'm now using. I've flown across the Country twice and the FIS-B weather information never let me down. Logically...
Forum: COMM 05-21-2018, 05:47 AM
Replies: 67
Views: 6,921
Posted By snopercod
I emailed adsb.gov and reported that the...

I emailed adsb.gov and reported that the reception from the ground station S of 0A7 seemed to be weak and asked them what the service volume was supposed to be. I flew down to SC yesterday and was...
Forum: ADS-B 05-20-2018, 03:25 PM
Replies: 7
Views: 904
Posted By snopercod
It's a Garmin GDL-82, and the FAA says it's...

It's a Garmin GDL-82, and the FAA says it's working fine. My gripe is that the only ground station in my area won't send me TIS-B data unless I'm within 7 NM of the station.

...and for Jesse, yes, I...
Forum: COMM 05-20-2018, 03:19 PM
Replies: 67
Views: 6,921
Posted By snopercod
I guess I could contact adsb@faa.gov

I guess I could contact adsb@faa.gov
Forum: COMM 05-20-2018, 05:10 AM
Replies: 67
Views: 6,921
Posted By snopercod
I've done that after every flight. All the...

I've done that after every flight. All the "failure" percentages are zero, but the "TIS-B Client" percentages suck. IOW The FAA can track me right down to the ground so, as far as they're concerned,...
Forum: COMM 05-20-2018, 04:59 AM
Replies: 67
Views: 6,921
Posted By snopercod
It's been almost two years so I'm due for another...

It's been almost two years so I'm due for another check. I wanted to get the GDL-82 installed prior to checking again.
Forum: COMM 05-20-2018, 04:51 AM
Replies: 67
Views: 6,921
Posted By snopercod
Nah, it's a GTX 327 Manual Rev J...

Nah, it's a GTX 327 Manual Rev J (http://www.mstewart.net/Downloads/GTX327_IM.pdf) from 2003, so I'm behind the times. Luckily, I can remove several feet of RG-142B from the transponder to the...
Forum: COMM 05-19-2018, 06:43 PM
Replies: 67
Views: 6,921
Posted By snopercod
Actually, if you will check section 2.3.4 of the...

Actually, if you will check section 2.3.4 of the Installation manual, you will see that the max coax length is 8.8'. Cheers!
Forum: COMM 05-19-2018, 05:22 PM
Replies: 67
Views: 6,921
Posted By snopercod
I have a BSEE and am familiar with multiplexing,...

I have a BSEE and am familiar with multiplexing, but I don't understand that statement. Are you saying my antenna is transmitting a burst of 1090 and then a burst of 978 (time division multiplexing),...
Forum: COMM 05-19-2018, 04:58 PM
Replies: 67
Views: 6,921
Posted By snopercod
There's no need to get snippy, Walt. Yes, I read...

There's no need to get snippy, Walt. Yes, I read the manual numerous times and mostly followed it. Garmin specifies "Standard 50 ohm vertically polarized antenna with a VSWR < 1.7:1 at 978 MHz and <...
Forum: COMM 05-19-2018, 10:19 AM
Replies: 67
Views: 6,921
Posted By snopercod
Switching to 978 ADS-B (out)

Allow me to revive this old thread with a new twist. I recently installed a Garmin GDL-82 UAT so that means my transponder is now broadcasting on 978 MHz rather than 1090 MHz. I am currently using an...
Forum: ADS-B 05-18-2018, 05:22 PM
Replies: 7
Views: 904
Posted By snopercod
I already had ADS-B (in) via Stratus/Foreflight,...

I already had ADS-B (in) via Stratus/Foreflight, but recently installed ADS-B (out). I have to say I am very disappointed that I still can't see all traffic. Unless your aircraft is a "Client" of the...
Forum: RV Ongoing Maintenance Issues 05-18-2018, 06:58 AM
Replies: 11
Views: 1,346
Posted By snopercod
Maybe the pads got contaminated with brake fluid?...

Maybe the pads got contaminated with brake fluid? Also, in my plane with the tiny little tires, I have to stay off the brakes until below 45 Kts lest I smoke the tires.
Forum: ADS-B 05-18-2018, 06:54 AM
Replies: 7
Views: 904
Posted By snopercod
https://adsbperformance.faa.gov/PAPRRequest.aspx ...

https://adsbperformance.faa.gov/PAPRRequest.aspx

Most of the numbers there are meaningless to us, but pay attention to the "TIS-B Client" percentage.
Forum: RV General Discussion/News 05-17-2018, 05:03 PM
Replies: 28
Views: 2,056
Posted By snopercod
Do you have an engine hoist?

Do you have an engine hoist?
Forum: RV General Discussion/News 05-17-2018, 03:59 PM
Replies: 7
Views: 532
Posted By snopercod
Evercoat

I use Evercoat Polyester Glazing Putty to fill the inevitable pinholes. I apply it with a single-edge razor blade. It dries in just a few minutes.

Out of pity, I should give you the whole procedure....
Forum: RV General Discussion/News 05-17-2018, 11:45 AM
Replies: 3
Views: 339
Posted By snopercod
How do you know it's running rich? Can a...

How do you know it's running rich? Can a bystander see black smoke coming out the stacks? Is this intermittent, as when you are pushing the throttle in - that could be your accelerator pump linkage...
Forum: ADS-B 05-17-2018, 10:44 AM
Replies: 8
Views: 455
Posted By snopercod
When connected to a Stratus, the ADS-B info shows...

When connected to a Stratus, the ADS-B info shows up automagically in the "Settings" (that little gear thingy) list. They only show when the Stratus is connected via...
Forum: RV General Discussion/News 05-17-2018, 04:53 AM
Replies: 43
Views: 4,512
Posted By snopercod
I've used it a couple of times. First, I was scud...

I've used it a couple of times. First, I was scud running in unfamiliar territory and it showed me the towers. When I arrived at my destination, visibility was poor and at first I lined up on a...
Forum: Trip Write-ups 05-16-2018, 06:07 AM
Replies: 12
Views: 2,543
Posted By snopercod
Man, what a trip! Personally, I don't have the...

Man, what a trip! Personally, I don't have the stamina to fly for 12 hrs non-stop. Four hours is my personal limit.
Forum: ADS-B 05-15-2018, 07:08 PM
Replies: 26
Views: 5,726
Posted By snopercod
That's possible. I'm just trying to figure how...

That's possible. I'm just trying to figure how this all works. I'm pleased that you worked with Ed. Small world. He and Marlene had me over to their house in Berkeley for supper once. I haven't...
Forum: RV Ongoing Maintenance Issues 05-15-2018, 07:01 PM
Replies: 12
Views: 3,537
Posted By snopercod
I've never heard of that. All I know is that...

I've never heard of that. All I know is that stainless steel has 1/10th the thermal conductivity of carbon steel. To me it seems like a bad idea if you're wanting to dissipate heat.
Forum: ADS-B 05-15-2018, 03:00 PM
Replies: 26
Views: 5,726
Posted By snopercod
I'm mulling that over. While sitting on the apron...

I'm mulling that over. While sitting on the apron in front of my hangar today, somehow ATC knew I was there as indicated by the "Ownership: Detected N10CF" in the screen shot above. So you're saying...
Forum: ADS-B 05-15-2018, 11:40 AM
Replies: 26
Views: 5,726
Posted By snopercod
I captured some screen shots today. I pulled my...

I captured some screen shots today. I pulled my plane out of the hangar so the GPS had a view of the sky. My hangar is probably 200' from the rotating radar antenna so I suppose I was in "radar...
Forum: ADS-B 05-15-2018, 05:41 AM
Replies: 26
Views: 5,726
Posted By snopercod
I'm using Stratus 2 / Foreflight / iPad as my...

I'm using Stratus 2 / Foreflight / iPad as my "in" setup. I have the 978 and 1090 "receive" parameters in the GDL-82 both set to "capable" so I think I'm set up correctly. My iPad shows that I'm...
Forum: ADS-B 05-14-2018, 12:15 PM
Replies: 26
Views: 5,726
Posted By snopercod
more information

I'll have to try this next time I'm up. From the Foreflight website:
Forum: ADS-B 05-14-2018, 05:59 AM
Replies: 26
Views: 5,726
Posted By snopercod
May I revive this old thread? I just installed a...

May I revive this old thread? I just installed a Garmin GDL-82 and it seems to be working as advertised, but my "TIS-B Client Percentage" has been in the 20% to 50% range. On my latest flight, I was...
Forum: RV General Discussion/News 05-14-2018, 04:39 AM
Replies: 48
Views: 3,130
Posted By snopercod
Oh thanks.On all my flights, my NIC was 9.0, NACp...

Oh thanks.On all my flights, my NIC was 9.0, NACp was 10.0, NACv was 2.0, SIL was 3.0, and SDA was 2.0. From reading Advisory Circular AC 20-165...
Forum: RV General Discussion/News 05-13-2018, 06:34 PM
Replies: 48
Views: 3,130
Posted By snopercod
Thanks for that helpful information, Steve. As...

Thanks for that helpful information, Steve. As you probably noticed, I have a Stratus 2, not a Garmin GDL 39. I'm glad to know I have the GDL-82 configured properly after all. I looked at my last...
Forum: RV General Discussion/News 05-13-2018, 11:41 AM
Replies: 48
Views: 3,130
Posted By snopercod
I have a GDL-82 configuration question and I...

I have a GDL-82 configuration question and I can't seem to find anything on the Garmin website. There are two buttons on the System Configuration page to set whether your system is "1090ES Receive...
Forum: RV General Discussion/News 05-13-2018, 08:27 AM
Replies: 29
Views: 1,829
Posted By snopercod
I've been flying for four years with the iPad Air...

I've been flying for four years with the iPad Air 2 running Foreflight Pro and am very happy with it. I have the cellular option to get the internal GPS, but don't have cellular service (too...
Forum: RV General Discussion/News 05-12-2018, 11:56 AM
Replies: 48
Views: 3,130
Posted By snopercod
I'm still disappointed. I had just departed GMU...

I'm still disappointed. I had just departed GMU today and was climbing through 2,500' when tower called a "fast mover" 500' below and heading right for me. He asked me to climb, and I did. Whatever...
Forum: Trip Write-ups 05-11-2018, 03:25 PM
Replies: 14
Views: 1,467
Posted By snopercod
That was some beautiful rambling. Yes, we are...

That was some beautiful rambling. Yes, we are truly blessed to live in America in the time that we do.
Forum: RV General Discussion/News 05-10-2018, 11:48 AM
Replies: 48
Views: 3,130
Posted By snopercod
In he case of the Baron, yes. I was airborne. In...

In he case of the Baron, yes. I was airborne. In the case of the two jets, I don't think so. I was on the ground then, ten miles away from a ground station. I'll keep investigating.
Forum: RV-10 05-10-2018, 11:45 AM
Replies: 17
Views: 832
Posted By snopercod
The ground plane requirement for the GDL-82 may...

The ground plane requirement for the GDL-82 may have been something the FAA imposed upon Garmin. That's all I can figure...
Forum: RV-10 05-10-2018, 11:06 AM
Replies: 17
Views: 832
Posted By snopercod
Tell it to Garmin. The installation instructions...

Tell it to Garmin. The installation instructions for the GDL-82 require a large one under the GA 32 WAAS antenna. It's a matter of signal-to-noise ratio, I think. The bigger the ground plane, the...
Forum: Traditional Aircraft Engines 05-10-2018, 10:53 AM
Replies: 39
Views: 4,254
Posted By snopercod
I can't quite see from the photos. Is your engine...

I can't quite see from the photos. Is your engine carbureted?
Forum: RV-10 05-10-2018, 10:07 AM
Replies: 17
Views: 832
Posted By snopercod
Many people report good luck with no ground plane...

Many people report good luck with no ground plane on their GPS antenna. Beats me...
Forum: RV-12 05-10-2018, 08:30 AM
Replies: 9
Views: 1,385
Posted By snopercod
What a great sound! Congratulations! I actually...

What a great sound! Congratulations! I actually tried taxi testing mine without the wings. That was a mistake because without that mass to either side, it was REAL squirrely on the runway. I aborted...
Forum: RV-10 05-10-2018, 08:24 AM
Replies: 17
Views: 832
Posted By snopercod
What about the ground plane? Garmin recommends an...

What about the ground plane? Garmin recommends an 18" dia ground plane for their GA 35 WAAS antenna.
Forum: RV Ongoing Maintenance Issues 05-10-2018, 08:22 AM
Replies: 13
Views: 1,523
Posted By snopercod
Oh well heck, I didn't realize there was an...

Oh well heck, I didn't realize there was an aluminum-to-fiberglass joint there. I have NEVER had any luck bonding fiberglass to aluminum. The best results seem to be obtained by cleaning and wet...
Forum: RV General Discussion/News 05-10-2018, 06:33 AM
Replies: 28
Views: 2,963
Posted By snopercod
I'm sorry those f'n birds soiled your plane. The...

I'm sorry those f'n birds soiled your plane. The big box stores sell some relatively cheap canvas tarps used for painting. The ones I bought were 4' wide and about 16' long - perfect for covering up...
Forum: RV Ongoing Maintenance Issues 05-10-2018, 06:27 AM
Replies: 13
Views: 1,523
Posted By snopercod
To me it sounds like there might be a weakness in...

To me it sounds like there might be a weakness in that area, but if you weren't flying yet, I don't know. I had a hairline crack in the front part of my lower cowling behind the spinner. I ended up...
Forum: RV Ongoing Maintenance Issues 05-09-2018, 04:40 PM
Replies: 13
Views: 877
Posted By snopercod
Dang...I forgot that one, too. Thanks!

Dang...I forgot that one, too. Thanks!
Forum: RV General Discussion/News 05-09-2018, 04:15 PM
Replies: 48
Views: 3,130
Posted By snopercod
Nah, I have the Stratus 2 - dual band. I probably...

Nah, I have the Stratus 2 - dual band. I probably left the "2" off in some of my posts. I'm going to keep investigating until I understand this setup.
Forum: RV Ongoing Maintenance Issues 05-09-2018, 02:34 PM
Replies: 13
Views: 1,523
Posted By snopercod
I'm a fiberglass guy and am scratching my head...

I'm a fiberglass guy and am scratching my head over your description. If one side of the crack is sticking up 3/32" above the other side, it's not what I would call a "hairline crack". I would need a...
Forum: RV Ongoing Maintenance Issues 05-09-2018, 12:57 PM
Replies: 13
Views: 877
Posted By snopercod
Thanks, Gill. That makes it easy!

Thanks, Gill. That makes it easy!
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