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08-26-2012, 09:50 AM
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Join Date: Jul 2009
Location: Mojave
Posts: 4,652
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I Can I See Myself on the G430 Traffic Display...
The RV displays traffic warning on the 430 screen from the 330 transponder which has proven to be very useful and accurate in the past. Last flight into Vegas however, I was letting down over the high terrain from the West and picked up a target centered on my position. Despite the severe clear weather, this is a traffic corridor and training area so the conflict was not unreasonable. After doing a visual search, I made a 90 degree clearing turn and the target followed. I then made a 180, and when the target followed again I decided I was seeing myself. I continued into VGT without ever seeing this "phantom" airplane.
Anyone else have this problem, and how is it fixed?
__________________
WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.
Michael Robinson
______________
Harmon Rocket II -SDS EFI
RV-8 - SDS CPI
1940 Taylorcraft BL-65
1984 L39C
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08-26-2012, 10:12 AM
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Join Date: Jan 2005
Location: San Mateo, CA
Posts: 1,419
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I too have this problem occasionally. Usually after I make a sharp turn or big altitude change (or 80% of the time when I do a loop). I think it is optimized for small course changes and big ones sometimes throw it off.
I've just gotten used to it and now treat it as no big deal.
Last edited by kevinh : 08-26-2012 at 10:44 AM.
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08-26-2012, 10:15 AM
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Join Date: Dec 2008
Location: Los Angeles, CA
Posts: 301
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me too
Hi, I had this problem with a Spam Can G1000. In my case I was in So Cal coming back from Point Mugu to Santa Monica along the coast below the ridge tops. Best I can figure out was the TIF traffic ground receiver was picking up a bounce off the Santa Monica mountains; or else I was being followed by an equally low funded pilot in a spam can.
__________________
John
2016 dues paid since 2008
- High hopes fade on a warm hearth stone,
he travels the fastest who travels alone-Kipling
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08-26-2012, 10:20 AM
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Join Date: Feb 2007
Location: Dallas, TX
Posts: 365
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Quite common in TIS systems. if I recall correctly, it has to do with the time delay in transmitting the primary radar data to the transponder.
__________________
Jeff Atkinson
RV-8 #82594 Flying since May 2012
Barrett XP-360, Catto 3-Blade, Dual G3X Touch, GTN-650, VP-X
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08-26-2012, 12:39 PM
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Join Date: Jan 2005
Location: Chandler, AZ
Posts: 2,904
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Other possibility
Hey Mike,
You could have possibly flown over a radar site. We have one West of Buckeye AZ on mountain. When I fly the medical helicopter to Yuma we fly close to this site. We always get the "traffic, traffic," audio warning and the screen. Nothing there. The first few times it was a little unnerving!!!
Just a possibility.
__________________
Darwin N. Barrie
Chandler AZ
www.JDair.com
RV-7 N717EE-Flying (Sold)
RV-7 N717AZ Flying, in paint
EMS Bell 407,
Eurocopter 350 A-Star Driver
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08-26-2012, 07:17 PM
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VAF Moderator / Line Boy
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Join Date: Jan 2005
Location: Dayton, NV
Posts: 12,256
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Acro does it to me almost every day - the "system" just isn't designed for rapid changes of direction and altitude, as folks have said.
__________________
Paul F. Dye
Editor at Large - KITPLANES Magazine
RV-8 - N188PD - "Valkyrie"
RV-6 (By Marriage) - N164MS - "Mikey"
RV-3B - N13PL - "Tsamsiyu"
A&P, EAA Tech Counselor/Flight Advisor
Dayton Valley Airpark (A34)
http://Ironflight.com
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08-26-2012, 08:38 PM
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Join Date: Jul 2009
Location: Mojave
Posts: 4,652
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No acro on this flight, but the ridgeline to the west of VGT is essentially a 2000 foot sheer cliff. I usually am in a 1000 fpm descent and clear the lip with about 100 feet to spare trying to get under the Vegas B airspace. Since I'm under the lip in seconds once in the valley, I can sure see a radar bounce off the cliff as a possibility.
I'm sure I've seen this before - next time I'll have to pay attention to the circumstances immediately prior to the event. I never considered maneuvering flight as a trigger.
Thanks all!
__________________
WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.
Michael Robinson
______________
Harmon Rocket II -SDS EFI
RV-8 - SDS CPI
1940 Taylorcraft BL-65
1984 L39C
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08-28-2012, 07:06 AM
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Join Date: Aug 2012
Location: Roswell NM
Posts: 86
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Have had this happen often in a G1000 Diamond DA40, being that it is very flat here around Chicago and I am not flying near anything tall I don't think it is a "bounce". There are some areas that always seem to cause the system to see itself, other times it is random.
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08-28-2012, 01:02 PM
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Join Date: Dec 2009
Location: West Jordan, Utah
Posts: 228
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It may be that you are seeing separate interrogations from 2 or more separate Terminal Radar locations.
I have seen this on the G1000 as well as I pass over the top of a second radar station. It kinda freaks you out when you suddenly get warned of traffic that is right under your butt...literally.
Just a thought.
__________________
Jason Hess
N777JH - Reserved
RV-7 - Builders Log Tail complete, wings nearly done, starting fuselage!
RV Factory - Complete sans floor coating, Slideshow Here
Quote:
People are not excellent because they achieve great things; they achieve great things because they choose to be excellent.
Gerald G. Probst, Beloved Grandfather, WWII B-24 Pilot, Successful Businessman
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08-28-2012, 01:47 PM
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Join Date: Sep 2006
Location: Locust Grove, GA
Posts: 97
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Don't get complacent
Thinking that you're seeing yourself on TIS and getting used to ignoring it could be a problem for you the one time that it's not really yourself that you're seeing on the screen.
I also wonder, given some of the demo's I've seen with ADS-B traffic displays where you can see other plane's N-numbers (assuming those are planes with ADS-B Out), if that wouldn't be the way to know if you're really seeing yourself or another plane.
__________________
Aaron Sims
RV-10 (2015 Bronze Lindy)
RV-6A (sold)
Home Field: Mallards Landing (GA04)
Locust Grove, GA
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