Looking into the TN70 a question comes to mind:Â* Can the GPS output be
split and used to feed the ClearNav, PowerFLARM, Dynon D10a, and
ClearNav Vario?Â* It seems such a shame to have FIVE GPS antennae on one
glider...Â* What about using one of those power splitters I've seen here
on RAS?

On 9/22/2017 10:06 AM, Dan Marotta wrote:
Jumping into the middle of this - what's the real reason to ignore an
ADS-B Out aircraft simply because the GPS source is "crappy"?Â* So what
if the position is off by 100 feet or so?Â* My PowerFLARM routinely
reports targets at 200 feet or more altitude difference, e.g., I may
get a report of a target 100 feet high and spot him a hundred feet or
so lower than I am.

It just seems ridiculous to ignore another aircraft which might be on
a collision course simply because his altitude or position may be
reported as a couple of hundred feet different from where he is.
That's what looking outside is for.Â* Following the same logic, of what
use is a non-TSO compliant GPS in an experimental aircraft if it will
be ignored by other aircraft?

Inquiring minds and all...Â* BTW, I plan on installing a TN70 to mate
with my TT22 in my certificated glider.

On 9/21/2017 7:41 PM, Darryl Ramm wrote:
On Thursday, September 21, 2017 at 6:20:54 PM UTC-7,
wrote:
What hasn't been discussed is how often non-approved ADSB out
sources are actually being ignored.
Ah I think we've been over what matters here many times, but it is a
mess.

100% of certified ADS-B in systems will ignore the ADS-B data from
100% of ADS-B Out systems that use a COTS/non-complaint GPS source
100% of the time.

So airliners, fast jets, regional jets, etc. which if they have ADS-B
In at all will be a certified In system, definitely won't see some
scabby ADS-B Out install using a COTS GPS source. Since many of those
aircraft today have TCAS II they will be see the transponder via TCAS
and be able to issue TCAS TA and RA fro that target. However the gap
in the middle is with many high-end GA aircraft that have certified
ADS-B In but no TCAS, they won't see a crappy COTS driven ADS-B Out.
But at the low-end GA market non-certified portable ADS-B In systems
will see those COTS powered targets. That is kinda brain dead but
it's how it is and easy to work around.. don't use a COTS GPS source....

With the relatively low price of theTN72, if owners want to equip an
experimental glider with ADS-B OutÂ* there is no excuse anymore for
using a COTS GPS source. I really don't want to get into how many GA
aircraft might or might not be affected, just do it properly and
install a TN72 or TN70 system. COTS GPS is just the wrong thing.



--
Dan, 5J