REFLECTOR: Garmin 250XL Autopilot Interface
Dennis King
kitfox94 at comcast.net
Wed May 15 07:54:40 CDT 2013
Thanks Jim...knowing it can work is half the battle for me. When you get your documentation it would be helpful for me to know which pin/channel you connected to the autopilot. I used "RS232 data out 2" (pin 19) because it was labeled as NMEA 0183 data in the Garmin installation manual. There's an ARINC 429 channel available which I did not use because I don't have the GPSS option in my Pro Pilot.
I will give Trio a call. I am very happy with how the autopilot is working when connected to my portable GPS. The factory default gains seem to work well on both axis on my plane (173 Elite RG).
Dennis King
----- Original Message -----
From: "Jim & Sharon Beck" <jsbeck618 at gmail.com>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Tuesday, May 14, 2013 10:45:18 PM
Subject: Re: REFLECTOR: Garmin 250XL Autopilot Interface
I have the 250 XL coupled to the Pro Pilot and it has worked flawlessly with no problems. My manuals are at the hangar snf don't remember exactly how I did it but just remember following the wiring diagram in the Garmin handbook.
Try giving Trio a call, I found them most helpful, even on weekends, with any problems. I will get my books this weekend and see if I can give any help
Jim
173 Elite RG
450 + hours
On Tue, May 14, 2013 at 12:02 PM, Dennis King < kitfox94 at comcast.net > wrote:
Does anybody have experience interfacing a Garmin 250 XL GPS/Com with an autopilot? I have one of the RS232 ports (channel 2) on the GPS connected to a Trio Pro Pilot. The autopilot receives the GPS info when the Garmin unit is in test mode, but not in normal operating mode, even in flight with or without an active course. I have no problem interfacing a portable GPS to the autopilot. It sure seems like I must have a setting wrong in the Garmin unit, but I've been through all the setup menus and tried all the logical settings. Since it works in test mode and with the engine running, it doesn't seem to be a wiring or interference problem (I used shielded cables). Just hoping someone else has interfaced the 250 XL with any brand autopilot and discovered a "trick".
Dennis King
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