Hi Ted,
Your post is just a little difficult to answer since you mention the heavy wing only in reference to having full tanks. You don't say whether your plane has aileron trim (electric or manual). But I'm assuming it doesn't, otherwise you would just trim out the imbalance in the full fuel or other
temporary imbalance conditions.
If you don't have aileron trim, Van's Aircraft has a manual aileron kit that is easy to install in an already flying plane.
https://www.vansaircraft.com/cgi-bin/store.cgi?ident=1544786653-74-60&browse=airframe&product=ail-tx
If you do have some type of aileron trim I'm assuming it is inadequate in trimming out the heavy wing.
As mentioned by Carl N. above, the pages he cites offer permanent solutions to an
always heavy wing. But I recently posted a simple solution which can be applied in a matter of minutes.
Put "Heavy Wing" in the search field and you will find much advice from other posters in a "Heavy Wing" post that began on December 3 of this year. Here is a link to that thread:
http://www.vansairforce.com/community/showthread.php?t=166523&highlight=wedge+easy+fix
My simple solution will come up on page 2 of that thread with the title "Wedge is an easy fix" then is followed up with a second post "Positioning the wedge".
Or... Just read my posts copied and pasted below:
"Wedge is an easy fix"
Please don't flame me, you more technical guys, about a "proper" fix …
Just trying to help a fellow RV pilot with a cheap, easy, and reversible solution.
A very easy fix for my heavy wing which could not be trimmed out with the manual trim, was a small piece of trailing edge Balsa wood affixed to the underside of the aileron of the LIGHT wing. That location may seem counter intuitive. But that's the way trim tabs work and the wedge is in effect, a trim tab.
We tried various lengths with both tanks full and fuel load balanced until it flew perfectly level with the manual trim lever and stick centered.
About a 6" length fixed the heavy wing for us in our RV4. There was no detectable change in speed, but the plane was noticeably more pleasant to fly.
Held in place with white Gorilla tape and is virtually invisible being on the underside of the aileron and the white tape matching our white aileron.
(Gorilla tape does come in a variety of colors and seems strong enough to survive at least mach 2 speeds)
The biggest issue was finding a place to buy the trailing edge balsa wood. Once I found a vendor I had to buy way more than I needed (i.e. several 3 FOOT lengths) but it was cheap. If you PM me with your address and contact info I would be more than happy to send you a three foot length.
FYI … My RV4 is a plane which I did not build. I bought it last March. We suspect the heavy wing is the result of some hanger rash where the previous owner dented an aileron on a hanger door. The intent is to re-skin the damaged aileron over the nasty flying weather months of January/February in this part of the world. But for now this was a great solution.
"Positioning the wedge"
I don't think the positioning laterally (towards root or tip) matters much since the purpose is to move the entire aileron. However I chose to put the wedge laterally toward the center of the trailing edge of the aileron on the bottom of the light wing, straddling one of the stiffeners of the aileron.
Orientation front to back the wedge is positioned with the thick portion of the wedge aligned with the underside of trailing edge of the aileron.
As previously mentioned, putting the wedge on the underside of the light wing may seem counter-intuitive (at least it was to me initially), but this is indeed the correct position. i.e. For a heavy left wing causing the plane to bank left, the wedge goes on the underside of the right wing aileron.
In taping the wedge to the aileron I chose to tape over the entire wedge, as opposed to using double sided tape or permanently mounting it with epoxy or silicone seal as other posters have mentioned in other threads.
i.e. The tape starts about a quarter inch in front of the thin portion of the wedge on the underside of the aileron to make a smooth transition from the aileron to the wedge. The tape then extends over the thick part of the wedge terminating on the top side of the aileron with about a quarter inch of tape showing on the top edge of the aileron. Thus the entire balsa wedge is enclosed in tape and protected from the elements.
Is this clear? I'd take a picture but as I mentioned in a previous post the repair is virtually invisible with the white Gorilla tape closely matching the white paint of the aileron.