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Thread: ADS-B Out

  1. #11
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    Default Re: ADS-B Out

    After a lot of phone calls, I think I know what is needed for ADS-B Out
    compliance. I'm personally waiting to see if prices drop. But were a person to
    do it today. To go from a "normal" Mode-C Transponder, with a conventional
    Encoder ... I created this diagram. Hope it helps make sense out of this mess.
    If I got something horribly wrong, I'll fix the diagram.

    Both Navworx, and Freeflight are similar, but differ a bit in how they
    listen to the transponder output. Navworx listens on the cable to the
    transponder antenna, Freeflight samples the RF output.

    Thanks!
    Jeff
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  2. #12
    Senior Member Dorsal's Avatar
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    Default Re: ADS-B Out

    Looks good though it is my understanding that the Navworx can pick up both squawk code and alt from the transponder antenna cable. This would eliminate the need for a new encoder (that outputs RS232). Also the antennas can be cheap, ball and stick for the UAT and basic GPS (<$20) mounted internally.
    Dorsal ~~^~~
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  3. #13
    Senior Member cubtractor's Avatar
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    Default Re: ADS-B Out

    Looks like Navworx has something even simpler than that:

    http://www.navworx.com/products-PADS-B.php
    Mike Bentley
    Model IV-1200
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  4. #14
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    Default Re: ADS-B Out

    The FAA hasn't approved portables yet, but according to an AOPA rep I
    talked to on the phone, they are trying to get the FAA to approve them.

    I hope they approve portables, even if there is a requirement to tie the
    device to an N-Number, at least it might save some money.

    The diagram I drew is my interpretation from phone calls, so I'm not sure
    how many systems hook up the same way. I do know that the ADS-B out MUST report the squawk code, and the Encoder reported altitude in the
    data it sends out.

    Jeff

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  6. #16
    Senior Member Dorsal's Avatar
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    Default Re: ADS-B Out

    Cool, I wonder if that means my un-certified Navworx unit now meets the mandate.
    Dorsal ~~^~~
    Series 7 - Tri-Gear
    912 ULS Warp Drive

  7. #17
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    Default Re: ADS-B Out

    Building equipment that is tested per the TSO performance and environmental requirements is one thing and not difficult to do. Generating the paperwork and getting FAA approval for a formal TSO takes a lot of manhours (money) and time. This policy change is very significant.

  8. #18
    Senior Member Slyfox's Avatar
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    Default Re: ADS-B Out

    my thought, like all electronics. I'm waiting. In 5 years, things will change a lot, along with cost. think computers and TV's. I don't have transponder in kitfox and don't use flight following. I turn on the tunes and off the radios. how about that. at least until It's time to land. than I need my radio.

    one more thing. with the faa saying an experimental does not need a tso'd device. one can only think what kind of equipment will come out now. I'd wait the 5 years and than buy.
    Last edited by Slyfox; 02-11-2015 at 07:50 AM.

  9. #19
    Senior Member Dorsal's Avatar
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    Default Re: ADS-B Out

    Certainly a good point Slyfox, in my case I put the unit in because I value the information it gives me now. If it also happens to meet the mandate for 5 years from now all the better. I, and more importantly SWMBO, like seeing all the little planes on the GPS (except Slyfox and others without transponders)
    It will certainly be an interesting space to watch with more options coming.
    Dorsal ~~^~~
    Series 7 - Tri-Gear
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  10. #20
    Senior Member cubtractor's Avatar
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    Default Re: ADS-B Out

    All of these are good points. I like to have alone time with just me and the airplane at times, maybe some tunes to plug into the intercom but the main reason I installed a transponder in the Kitfox was so the bigger guys can see me. Flying professionally it's nice to see small planes show up on the TCAS at an uncontrolled airport when approaching at 150-180 knots until final or base to final. I like to visually see others from my Kitfox and also see someone in a Kitfox from the thing with two hairdryers strapped to the tail end. That being said, I'll probably wait until closer to the mandate for ADS-B to upgrade for the same reasons Slyfox is.
    Mike Bentley
    Model IV-1200
    Jabiru 2200A #438
    Rotec Aerosport LCH Heads
    Ellison EFS-2 Throttle Body
    Prince Prop (64x34)
    My SPOT Page

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