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Old 07-19-2021, 07:30 PM
Scott Hersha Scott Hersha is offline
Join Date: Jan 2005
Location: Cincinnati, OH
Posts: 1,922

Nice job Scott! Looks good to me. I used 3 #8 screws on the bracket (overkill probably) and made my bracket out off mild steel from Menards, but the setup is very similar. Your setup which is further up towards the stick will give you more torque, which is probably a good thing. This configuration works very well, and is easy to check and service. Seems like a preferred location for RV4 roll servos.
RV6/2001 built/sold 2005
RV8 Fastback/2008 built/sold 2015
RV4/bought 2016/sold/2017
RV8/2018 built/Sold(sadly)
RV4/bought 2019 Flying
RV6/Used kit purchased 2021 building
Cincinnati, OH/KHAO
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Old 07-21-2021, 07:55 AM
Freemasm Freemasm is online now
Join Date: Nov 2017
Location: Orlando
Posts: 448

Originally Posted by Scott Hersha View Post
.....very similar. Your setup which is further up towards the stick will give you more torque, which is probably a good thing....
First off, make no mistake assuming I have any experience with autopilots; however, in my experience with designing (mostly industrial gas turbine) systems, it is most always better to take advantage of the full range of motion of an actuator whenever possible. Regardless of how finite the feedback, doing the aforementioned reduces the chances of the system acting overdamped/hunting/etc. Who knows what issues I'll encounter trying to validate everything but hopefully that issue won't be one of them.

On other related second thoughts, I'm probably going to forgo a bushing and thicken the attach bracket to match that of the actuator arm. I'm fine with the strength aspect as installed but unsure of any linkage fastener hole wear. I'm assuming Garmin's analysis and experience have validated their material choice from that perspective so I'll probably copy that in time.

Much thanks to all.

Last edited by Freemasm : 07-21-2021 at 10:46 AM.
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