ORIGINAL: mesaflyer
I am a little afraid of trying what "jaka" said to do about removing the twist. I did a few aileron rolls both directions and it seemed pretty normal to me. But, I don't want to crash the plane if there is a possibility that the twist will get worse. Got to tell you, this being my third plane, it scared the heck out of me when it rolled over on take off. I was shaking so bad after it landed I did not even fly until the next day!
Thanks again for all of your help.
Pete
Actually, there is a way to see twist and it's easy to do.
It's not easy to describe, so I'll upload a picture to help explain. And when I'm done explaining you'll not only see a warped wing, but one that's got wash-in.
Setup the airplane so you can look at it from exactly the center rear. Move the plane or your eyes so that you can see both wings equally, and so that you see a couple of things about those wings. You can tilt the tail up and down until you see the Trailing Edge of the wing and it looks like it is exactly in the middle of the top of the wing and the bottom of the wing. If the wing isn't warped or twisted, as you inspect the wing from root to tip, you'll see just as much top as you'll see bottom. Look at the wing from the root out to the tip. Both sides.
I added a couple of black lines to the right wing to help the picture show what we're looking at. If you look closely, there are really 3 lines, two black ones I added, and a white one that's a bright white TE thanks to the camera's flash. And if you look closely, you'll see that close to the fuselage, the top and bottom of the wing look about equally thick. But as you look out toward the tip, notice how the TE seems to twist down? That's a warp. And it's one that is called "washin". And it's not what we usually want, if we want any "wash" at all.
OK? Pretty easy to do, isn't it. It helps when you're at the field to have the sun at your back, btw. And there are a couple of ways to do the lineup. If the wing is cambered, you can line it up the way the stab/elevator is in the picture, only in the picture it's "upside down" for a cambered lineup. Basically, you tilt the tail down until the TE of the wing starts to line up with where the bottom black line is on the picture. And as those two lines come together you can see if they're coming together equally along the span.
The idea is the same for both methods. You compare the TE's "line" to the line along the top of the wing and to the line along the bottom of the wing. Do what you can see the best.
Now, about "ironing out a warp"........................