ADS-B equipment in a single seater Pitts

Discussion in 'Electrical & Instrumentation' started by Charles67, Feb 21, 2018.

  1. Feb 21, 2018 #1

    Charles67

    Charles67

    Charles67

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    Has anybody already installed ADS-B equipment in a single seater Pitts?
    I would be interested in getting recommendations on the type of equipment used, location of the equipment, location of the antenna, potential interference with other avionics, tests conducted.

    Thanks
     
  2. Feb 21, 2018 #2

    Dave Baxter

    Dave Baxter

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    Charles, there are several threads regarding your question, but so far nothing that is simple easy or inexpensive that I am aware of? Tried the search function but it says no such post exists? Dave
     
  3. Feb 21, 2018 #3

    Morphewb

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    www.uavionix.com

    I'm sure you don't have nav lights but they might have something that will work. Their nav light installation is pretty innovative but I wonder how many experimentals are flying that need ADSB but don't have or need nav lights. I'm sure they have something that will work but everything I have will probably get the Garmin GDL 82 since I already have electrical systems and transponders. I live under the DFW class B veil radius so I don't have any choice.
     
    Last edited: Feb 21, 2018
  4. Feb 21, 2018 #4

    garyg

    garyg

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    I installed a Trig Transponder TT22, a Trig TN72 ADS-b out (experimental) and a GPS antenna. Waiting for warmer day to open hanger door and power it on but it is all wired up.

    If going new, I suggest buying a modern transponder.
     
  5. Feb 21, 2018 #5

    Charles67

    Charles67

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    Thanks for your reply. I assume that the Trig TN72 ADS-B out can be used only on experimental airplanes. Could you please advise if my understanding is correct?

    Thanks
     
  6. Feb 21, 2018 #6

    cactusav8r

    cactusav8r

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    According to Trig, their ADS-B out requires a Trig Mode S transponder.

    Also read this, it does not look like this one is actually ADSB compliant....


    Approved Trig Dealers will soon be shipping the TN72 which is highly capable and simple to install. The unit is an ideal addition to any Trig Mode S transponder. The TN72 provides the reassurance of a certified product with the genuine safety benefits and enhanced visibility of ADS-B Out.

    The TN72 is ideally suited for use as a VFR collision avoidance device in all non mandatory ADS-B airspace or where equipage is voluntary.

    The product meets FAA TSO-C199 certification, as a Traffic Awareness Beacon System – known as TABS for short. The TN72 supports current and future air-to-air collision avoidance and situational awareness applications. This enhanced visibility can be useful for tracking club aircraft in real time, improving safety in the approach and circuit and reducing the risk of air-to-air collision on any transit flight.
     
  7. Feb 21, 2018 #7

    garyg

    garyg

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    TN72 meets experimental category for ADS-B out:

    from the Trig manual:
    https://www.trig-avionics.com/librar...n Manual.pdf

    11.2 FAA 91.227 Compliance
    When installed in accordance with this manual and used with the Trig TT22
    and Trig TT31 transponders the TN72 meets the technical requirements of FAR
    91.227 and the performance requirements of the applicable TSOs.
    When configured as “TN72 SIL = 3” position source with a Trig transponder
    the system will report:
    Parameter Value Meaning
    Quality Indicator NIC
    (Navigation Integrity Category)
    >= 7
    (Dynamic)
    Radius of containment
    <370.4 metres
    Quality Indicator NACP
    (Navigational Accuracy for
    Position)
    >= 8
    (Dynamic)
    Position Uncertainty <92.6
    metres
    Quality Indicator NACV
    (Navigational Accuracy
    Category for Velocity)
    1 10 m/s
    Quality Indicator SIL (Source
    Integrity Level)
    3 Error probability < 1 x 10-7

    I have chased my way around the experimental ADS-B out FAA req. for an additional 1200 more than than the experimental ADS-B out you can get the certified version but there is no need to do that on an experimental aircraft.

    https://www.gpo.gov/fdsys/pkg/CFR-2012-title14-vol2/pdf/CFR-2012-title14-vol2-sec91-227.pdf

    (1) For aircraft broadcasting ADS–B
    Out as required under §91.225 (a) and
    (b)—
    (i) The aircraft’s NACP must be less
    than 0.05 nautical miles;
    than 10 meters per second;
    (iii) The aircraft’s NIC must be less
    than 0.2 nautical miles;
    (iv) The aircraft’s SDA must be 2;
    and
    (v) The aircraft’s SIL must be 3.
    (2) Changes in NACP, NACV, SDA, and
    SIL must be broadcast within 10 seconds.

    (3) Changes in NIC must be broadcast
    within 12 seconds.

    from ACS:
    Interfaces with Trig transponder to provide ADS-B Out
    GPS receiver – certified to TSO-C199
    Meets position requirements of FAR 91.227 for Experimental and Light Sport – 2020 compliant in U.S.
    Enhances visibility and safety
    Collision avoidance (uses non zero quality indicators)
    Enables live tracking of aircraft
    Triggers traffic information services (TIS-B only available in U.S.)
    Low cost and light weight
    Global Trig warranty
     
    Last edited: Feb 21, 2018
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  8. Feb 21, 2018 #8

    smizo

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    Gary do you have one of these units yet?
     
  9. Feb 21, 2018 #9

    garyg

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  10. Feb 21, 2018 #10

    davidkarlsberg

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    I have the TRIG mode S transponder (TT22) with the control head mounted to the right side of the fuselage under the panel. The main box is mounted on the bottom side of the baggage compartment. I also have a GRT safe flight GPS for position source also mounted underneath the baggage compartment. The gps antenna is Velcrod to the longeron in the cockpit. All works fine. The transponder antenna is just the standard one with the little ball at the end mounted through the sheet metal on the belly. This is the cheapest solution I could come up with and easiest to mount because the control head for the transponder is very small.
     
    Last edited: Feb 21, 2018
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  11. Feb 22, 2018 #11

    Charles67

    Charles67

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    Thanks to All!
     

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