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  #1  
Old 04-18-2019, 02:53 PM
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Noah Noah is offline
 
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Default Swapping ADS-B transmitter between 2 aircraft

I need to equip 2 aircraft with ADS-B out. One of them is my RV, and the other, a manned hydrogen balloon, is only flown once or twice per year. I'm thinking of having compliant position sources, antennae, transponders, and harnesses in each aircraft, and simply moving the ADS-B unit itself. This should be pretty simple if I locate it someplace accessible.

Any gotchas to this plan I haven't thought of?

I'm currently leaning toward the uAvionix Echo, simply due to cost. Registration, aircraft type, and other settings are easily reconfigured via wireless connection to a tablet, so the thinking would be that I would have a list of settings to change when moving between aircraft. Position would come from a GNS430W in the RV, and a SkyFYX in the balloon. Each aircraft already has a Garmin transponder. Might not be able to do international flights with 978 MHz UAT transmitter. Planning to port data to AFS4500.
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  #2  
Old 04-18-2019, 03:06 PM
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Default Not required in the balloon?

I know aircraft without engine-driven electrical systems are exempt --- why does the balloon require it?

Ron
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  #3  
Old 04-18-2019, 03:13 PM
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Quote:
Originally Posted by RONSIM View Post
aircraft without engine-driven electrical systems are exempt --- why does the balloon require it?
Great question! These flights are hundreds to thousands of miles and go for multiple days through / over all kinds of airspace. So primarily need it so I don't splat on the windshield of an airliner some dark night while my copilot is flying and I'm sleeping.
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Noah F, RV-7A

All men dream, but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find that it was vanity: but the dreamers of the day are dangerous men… for they may act their dream with open eyes, to make it possible. -T.E. Lawrence
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  #4  
Old 04-19-2019, 07:44 AM
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Smile Great reason!

Had not thought about that scenario!
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IO360, 180HP/CS, AFS 5600T, D10A, G650, G430, G327, ADS-B, VIZ385 AP
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  #5  
Old 04-19-2019, 08:13 AM
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I know this can't be done with GA aircraft because it requires a 337 with I/A sign-off after installation. If proper transponder/ADS-B ground test equipment is not available, another 337 is required to prove it passed the FAA validation during a post installation operational flight evaluation (OFE). I supposed you could move the equipment, in this case, and re-do the paperwork each time.
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Last edited by Raymo : 04-19-2019 at 08:17 AM.
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  #6  
Old 04-19-2019, 08:20 AM
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Quote:
Originally Posted by Raymo View Post
I know this can't be done with GA aircraft because it requires a 337 with I/A sign-off after installation.
Both aircraft are experimental, does that apply here?
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All men dream, but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find that it was vanity: but the dreamers of the day are dangerous men… for they may act their dream with open eyes, to make it possible. -T.E. Lawrence
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  #7  
Old 04-19-2019, 08:31 AM
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Quote:
Originally Posted by Noah View Post
Both aircraft are experimental, does that apply here?
The 337 does not apply to EAB. I don't know what the regs say around moving equipment but I would think the FAA expects it to be a permanent installation. You'd certainly have to update the tail number and ICAO hex code with every swap, but that isn't difficult.
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RV-7A - Slider - N495KL - First flt 27 Jan 17
O-360-A4M w/ AFP FM-150 FI, Dual PMags, Vetterman Trombone Exh, SkyTech starter, BandC Alt (PP failed after 226 hrs)
Catto 3 blade NLE, FlightLines Interior, James cowl, plenum & intake, Anti-Splat -14 seat mod and nose gear support
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  #8  
Old 04-19-2019, 04:38 PM
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Quote:
Originally Posted by Noah View Post
Great question! These flights are hundreds to thousands of miles and go for multiple days through / over all kinds of airspace. So primarily need it so I don't splat on the windshield of an airliner some dark night while my copilot is flying and I'm sleeping.
That’s a very good reason!
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  #9  
Old 04-19-2019, 06:52 PM
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Noah,
That should work as the echo UAT transceiver is a standalone unit. You can easily mount it on the same ground plane as the UAT antenna in the balloon. It should be easily ported to either aircraft. I recently installed the same unit on the inboard wing inspection panel.

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  #10  
Old 04-19-2019, 07:00 PM
TimO TimO is offline
 
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I'm not sure how high you fly the balloon, but in the flight levels, 978Mhz UATs aren't legal ADS-B systems. For the flight levels you'll want a 1090Mhz system.
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