Garmin GPS 20A with Trig TT22 in Experimental Glider - OK?

On Saturday, December 19, 2015 at 6:56:16 PM UTC-5, Darryl Ramm wrote:
There is no excuse for a USA based manufacturer to be developing an ADS-B receiver today that is not dual-band/link layer.

On Dec 17, 2015, Bad Elf announced what they're calling a dual band receiver. Does this address your dual band concerns?

https://www.kickstarter.com/projects.../posts/1447126

The price went up to $549 on the dual band model, but it now claims to include non-toy AHRS and a rudimentary Flight Data Recorder.

I'm not saying that this is legit, but it is interesting.

On 12/20/15 5:31 AM, son_of_flubber wrote:
On Saturday, December 19, 2015 at 6:56:16 PM UTC-5, Darryl Ramm wrote:
There is no excuse for a USA based manufacturer to be developing an ADS-B receiver today that is not dual-band/link layer.

On Dec 17, 2015, Bad Elf announced what they're calling a dual band receiver. Does this address your dual band concerns?

https://www.kickstarter.com/projects.../posts/1447126

The price went up to $549 on the dual band model, but it now claims to include non-toy AHRS and a rudimentary Flight Data Recorder.

I'm not saying that this is legit, but it is interesting.


Yes, indeed that solves the dual-link issue I have. Thanks for pointing
that out. But it kind of ruined the point of having a good long rant...
:-) But still I am far from impressed with their "oh we wanted to bring
a weather and AHRS product to market first"... uh bull**** they *were*
positioning it as a ADS-B traffic solution. Yes if you dug int the
details they warned that you needed ADS-B Out for ADS-R via the FAA
ground stations to give you 1090ES traffic data. But still there is no
excuse in my books for companies to screw around with new products that
are single link only receivers. Just a very very bad idea.

I do believe this is a legitimate attempt to do a crowdfunded device,
and BadElf has delivered nice GPS products before. I'm not questioning
them on any of that.

The question remains why not just buy a Garmin GDL39 or GLD39-3D (with
AHRS) or Status S2? Especially compared to funding a much riskier
kickstarter project for a somewhat cheaper ($549 vs. ~$900) me-too
product, vs. buying from very well established current vendors. We'll
see if they even get funded (they want $500k). Some even preliminary
specs like battery technology/life etc. seem to be not available.

It is a small sample size but effectively everybody I know who is flying
GA aircraft with portable ADS-B In is using a Stratus. I hope they are
all Stratus S2 (i.e. dual-link), but I'm not sure. That is largely
driven by the popularity of Foreflight software and their bundling with
Status.

OTOH personally much more interesting to me is the Rasberry Pi Stratux
mentioned here by Bill. (Note the dig at Appareo Stratus). That's a
great hacking platform for technical folks to play with and understand
ADS-B, the latest of several software defined radio projects (mostly for
1090ES In), but probably the most flexible. Not of any interest to me to
actually want folks to fly with... but interesting for folks who want to
play/understand ADS-B, set up ground receivers/trackers, etc.