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  #1  
Old 01-16-2018, 04:19 PM
jacksel jacksel is offline
 
Join Date: Jul 2005
Posts: 108
Default heavy left wing

Started flying my RV-7 a few months ago. Having gotten all the big issues ironed out I'm now looking into something that's been bothering me all along. I seem to need to input right aileron trim (manual) to relieve all pressure from the stick. This is during coordinated level flight. The wing trailing edges appear the same to me, but I know I'm consistently needing right trim. This is with the fuel balanced. I do prefer to fly from the right seat but I am doubtful that would make any difference. Has anyone dealt with this before?
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  #2  
Old 01-16-2018, 04:29 PM
xblueh2o xblueh2o is offline
 
Join Date: Apr 2011
Location: SF East Bay
Posts: 770
Default

Start here.
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RV-8 with the Showplanes Fastback conversion
Emp completed except for glass work
Wings completed except for bottom skin and glass work
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  #3  
Old 01-16-2018, 10:15 PM
jacksel jacksel is offline
 
Join Date: Jul 2005
Posts: 108
Wink

Thanks for the reply. I knew there was something out there but couldn't find it. Very informative.
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  #4  
Old 01-17-2018, 09:30 AM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 7,803
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Quote:
Originally Posted by xblueh2o View Post
Start here.
And reference page 05-10 of Section 5 to evaluate that both ailerons are properly shaped and symmetrical with each other before making any compensation adjustments.
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  #5  
Old 02-01-2018, 10:24 AM
Starlifter Starlifter is offline
 
Join Date: Aug 2016
Location: Granbury, TX
Posts: 23
Default Me Too

I had the same issue with an RV-7A I bought over a year ago. Annoying. However, after contacting a friend of mine who has built two 6As and very well versed in all things RV we set up to go through the complete scenario of determining the problem.

I flew to get gas to even up the tanks. On the ten minute flight to his field I decided to try one more thing. I weigh 193 lbs and decided to see if that might make a difference. I moved to the center of the airplane with my left foot on the left rudder pedal and right on the right. When I trimmed out the stick pressure, damned if my aileron trim wasn't centered!

So what I decided to do was pinch the trailing edge of the right aileron so that I would need less right trim when solo (most of my flying), and a little left trim when dual.
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  #6  
Old 02-01-2018, 10:57 AM
Simon Hitchen Simon Hitchen is offline
 
Join Date: Apr 2006
Posts: 240
Default Same same

I had exactly the same issue. I followed Vanís advice and slotted the heavy wing aileron brackets thereby moving the aileron vertical position 1/32 of an inch. It fixed the heavy wing instantly. I then ordered new blank brackets, drilled them to the new position, painted them, installed them and it flies beautifully with minimal trim. Obviously youíll need to trim for single pilot and fuel usage but thatís normal.

Simon
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Port Perry, ON, Canada
7 Tip Up, Titan XIO-360, Sensenich FP Prop, Dynon Skyview, GTR-200, GTX-327
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  #7  
Old 02-01-2018, 11:22 AM
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snopercod snopercod is offline
 
Join Date: Aug 2016
Location: Asheville, NC
Posts: 1,404
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I weigh in at 260#, so I always have a heavy left wing when flying solo. I fly with 5 gal. more fuel in the right tank, which perfectly balances out the left seat weight. If I don't do that, my roll trim is maxed out.
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  #8  
Old 02-01-2018, 11:33 AM
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JonJay JonJay is offline
 
Join Date: Jan 2007
Location: Battleground
Posts: 3,977
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As mentioned, and noticed, a balanced side by side will require stick input or trim when flying solo all things being equal except passenger. I don't consider this a "heavy" wing. Some choose to make rigging adjustments for solo flight while others, like me, prefer to keep it balanced at the centerline. Just make sure you are not chasing a problem that really isn't there.
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