ARINC 429

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dtwrv6
Posts: 3
Joined: Tue Aug 15, 2017 10:45 am

ARINC 429

Post by dtwrv6 »

I’m planning to connect my Sport SX to a GNS420. What functionality do I get with the ARINC439 that I can’t do with the serial connections?
GRT_Jeff
Posts: 656
Joined: Tue Dec 11, 2012 12:11 am

Re: ARINC 429

Post by GRT_Jeff »

ARINC-429 transfers the approach deviation data and allows you to use the EFIS to adjust OBS in waypoint OBS mode. Without it you can't display the GPS approach deviations or have the EFIS track them with the autopilot function (including vertical, if your SX has vertical autopilot functions). The RS232 connection only transfers GPS position and basic flight plan data like identifiers and coordinates.
dtwrv6
Posts: 3
Joined: Tue Aug 15, 2017 10:45 am

Re: ARINC 429

Post by dtwrv6 »

Will the EFIS display the 420 flightplan?
Bobturner
Posts: 425
Joined: Mon Mar 11, 2013 6:34 pm

Re: ARINC 429

Post by Bobturner »

Completely off-topic: If you have a 420W (WAAS), and if you think you might want to install ADSB-out sometime later: While you're inside the rear connector on the 420W for the Sport hook up, install a pin and 6 feet of wire to an unused RS232 out port (later it will supply gps data to the ADSB-out). You'll thank me later. By the way, those 420 pins are high density ones.
GRT_Jeff
Posts: 656
Joined: Tue Dec 11, 2012 12:11 am

Re: ARINC 429

Post by GRT_Jeff »

dtwrv6 wrote:Will the EFIS display the 420 flightplan?
Yes, as simple waypoints. It will display the waypoint identifiers and connect them with straight lines. The 420 does not transfer information about early turns, holding patterns, procedure turns, or other curves, so that is not displayed.
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