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  #1  
Old 02-13-2022, 10:21 AM
CABaye CABaye is offline
 
Join Date: Sep 2021
Location: Saint Paul, MN
Posts: 8
Default GSA28 Roll Servo Install using Garmin Kit

Preface. The airplane is new-to-me and this is my first modification project.

I'm installing the GSA28 Servo using the Garmin Kit. If I understand the instructions correctly, the bracket is secured by fasteners penetrating the skin and sandwiching it to an external doubling plate (provided). If you have used this method; please comment on surface prep & finish for the doubling plate. Is any sealing recommended between the doubling plate and the skin?

I am replacing a Trio EZ-Pilot servo that was mounted to a tray that is about 1/2 inch above the lower skin. (see photo) I suspect that mounting the servo to the tray would invite geometry problems but would like the opinions of others.

Thanks,
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  #2  
Old 02-13-2022, 10:49 AM
rockwoodrv9 rockwoodrv9 is offline
 
Join Date: Dec 2011
Location: Meridian ID, Aspen CO, Okemos MI
Posts: 3,147
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Im looking at the photo and not sure if I understand how you plan to install the servo. Mine is a 9, so maybe different and mine was installed in the build - but it was done in the wing. Is this the center section? Is that where the servo is installed on a retrofit?

Sorry I cant be of more help but I am interested in learning something here! I hope someone who has done the retro in a 6 will chime in.
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Old 02-13-2022, 12:40 PM
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mfleming mfleming is offline
 
Join Date: Sep 2016
Location: Joseph, Oregon
Posts: 957
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Quote:
Originally Posted by CABaye View Post
Preface. The airplane is new-to-me and this is my first modification project.

I'm installing the GSA28 Servo using the Garmin Kit. If I understand the instructions correctly, the bracket is secured by fasteners penetrating the skin and sandwiching it to an external doubling plate (provided). If you have used this method; please comment on surface prep & finish for the doubling plate. Is any sealing recommended between the doubling plate and the skin?

I am replacing a Trio EZ-Pilot servo that was mounted to a tray that is about 1/2 inch above the lower skin. (see photo) I suspect that mounting the servo to the tray would invite geometry problems but would like the opinions of others.

Thanks,
Looking at the Garmin manual 190-01115-01_ap it looks like your correct.
If it were me, I would not deviate from the Gamin instructions for the GSA28 installation.
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Joseph, OR
sagriver at icloud dot com

RV-7 Slider #74572
Started 11/2016
Empennage completed 11/2016
Ailerons and flaps completed 3/2017.
Wings completed 12/2017
Started on QB fuselage 01/2018
Sliding canopy mostly completed 10/2020
Wiring and Avionics harness completed 9/2/2021
FWF Started 9/3/2021

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