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  #1  
Old 01-06-2020, 09:56 AM
philfoshee philfoshee is offline
 
Join Date: May 2019
Location: Woodinville
Posts: 6
Default Electric Aileron Trim

I have an RV8 wing kit with electric aileron trim which uses a tab on the aileron instead of the spring system that is currently available from Vans. Any opinions as to which system is better? I haven't installed the trim kit and could change if the new systems were better.
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  #2  
Old 01-06-2020, 10:53 AM
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fl-mike fl-mike is offline
 
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The spring bias system is just "okay".
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  #3  
Old 01-06-2020, 12:33 PM
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Bob Martin Bob Martin is offline
 
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Location: Charlottesville, Virginia
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The spring system is not "better" just different. IMHO.
The aileron tab is crisp, visable and repeatable. But does hang out on the exterior of the plane.
The spring system is dependant on the spring being pulled by a servo.
I retrofitted the trim tab system in my -6 before I repainted. A harder job than the spring bias system, but I like it very much.
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RV-6, 0-360 Hartzell C/S, Tip up, 1200+TT
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  #4  
Old 01-06-2020, 12:53 PM
Hwood Hwood is offline
 
Join Date: Feb 2005
Location: Central Alabama
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I had a spring system on my last -8 and had no issues...worked well! Doing the same on the one I'm building now.
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  #5  
Old 01-06-2020, 02:29 PM
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RV8JD RV8JD is offline
 
Join Date: Jan 2005
Posts: 917
Default or ...

Something to consider: My previous RV-8 had the spring system, which worked well to compensate for a slightly heavy left wing. It had no autopilot so was always hand-flown.

My current RV-8 has no aileron trim system. It does not have a heavy wing and I switch fuel tanks every 30 minutes. I do fly a fair amount on autopilot where any lateral imbalance is automatically taken care of, but it's not an issue when hand-flying either. Although I thought I would miss the aileron trim, turns out I really haven't.

The side-by-side airplanes may have a greater need for aileron trim when flown solo, than airplanes with centerline seating do.
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Last edited by RV8JD : 01-06-2020 at 03:02 PM.
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  #6  
Old 01-06-2020, 03:40 PM
philfoshee philfoshee is offline
 
Join Date: May 2019
Location: Woodinville
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Thanks to each of you for your feedback to my question. Since I have the trim tab system I will plan to install that.
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  #7  
Old 01-06-2020, 03:41 PM
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Pilot135pd Pilot135pd is offline
 
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Location: Vaca Moo Airport - TA37 in East TEXAS
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I have the spring system and when I bought it the spring was disconnected (on purpose) so after flying a little I decided to install it to see the difference. I used it for a few flights then forgot I had it and when I fly I rarely use it at all anymore. I might just remove it all this month during Condition Inspection because every little pound helps !
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  #8  
Old 01-06-2020, 03:59 PM
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DanBaier DanBaier is offline
 
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Location: Rochester NY
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I have the spring system in a 7A. Set to neutral and pretty much something to forget (a little over 10 years in the air) it if you manage the fuel burn equally.

Dan
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