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I am wondering if anyone has thoughts about the optimal location for the ADS-B antenna. One possibility is the UAVIONIX tail beacon, but it seems absurdly expensive. This application is for a new-build aircraft, and avoiding adding unnecessary drag is important.

Thanks.

To meet the ADS-B requirement, I replaced my Garmin 327 with a Garmin 345, and I just used the same transponder antenna. It’s just the simple internal antenna that I built into the wing that Sequoia provided, I think Jim Weir (RST) designed it. So far it has worked fine.The other part of the requirement is a WASS GPS which I already had (Garmin 430) and also altitude encoder info, both wired to the Garmin 345. The unit is both 978 and 1090 and it gives me traffic and FIS-B weather on the Garmin 430 screen.

I did the same and have the same setup as Tom. No issues....

Where are you all mounting the WAAS GPS antenna?

George

Under the canopy on the turtle deck

Top of dash — under the windshield — have had no issues