Ringmaster Jr. Outboard wing "droop"

[taildragger-j3]

I was flying my RM Junior yesterday and noticed that when I doing an inside loop I could see the bottom of the outside wing.

When I covered the wing, the trailing edge warped down. I thought that might cause the plane to try to bank into the middle of the circle, so I put a small trim tab on the outboard wing to hold it down. It seems to be OK in level flight, but I noticed this tendency to roll to the right when I was inside loop.

I read one place that the condition might even be caused by too much weight in the wingtip, although Big Bear suggested that if the wing was level in upright and inverted flight the weight was OK. At this point I don't know what to do to keep the wing level during a loop.

Any suggestions??

[Brett Buck]

I was flying my RM Junior yesterday and noticed that when I doing an inside loop I could see the bottom of the outside wing.

When I covered the wing, the trailing edge warped down. I thought that might cause the plane to try to bank into the middle of the circle, so I put a small trim tab on the outboard wing to hold it down. It seems to be OK in level flight, but I noticed this tendency to roll to the right when I was inside loop.

I read one place that the condition might even be caused by too much weight in the wingtip, although Big Bear suggested that if the wing was level in upright and inverted flight the weight was OK. At this point I don't know what to do to keep the wing level during a loop.

Any suggestions??

    Without seeing what it does on *outside* loops, it's a toss-up. If you see the top of the outboard wing on outside loops, you have too much tip weight. If you see the bottom of the outboard wing on outsides, you have  a warp.

     I would guess that the problem is excess tip weight, since it's not obvious in level flight, but check the outsides first. In any case, go easy on removing tipweight. Excess tipweight increases the line tension and has significant ill effects only in hard corners.

     Brett


If you want to know one possible approach, and don't mind the "I-wanted-the-time-but-you-told-me-how-to-build-a-clock" nature of this post:   http://stunthanger.com/smf/index.php?topic=7798.0

[taildragger-j3]

Listen, I'm grateful for any advice. The more the better!!!

I've only gotten 6-8 flights on this little Junior, and have must begun to explore it's aerobatic abilities. It is hugely more sensitive than my RSM Ringmaster even with limited control throws. It's control response reminds me more of combat wings I flew 1000 years ago. My reflexes are not what they were, nor have I been back in the center of the circle as much as I need to.

It has an old Greenhead .15 on it that runs like a scared rabbit most of the time. I'm still figuring out the needle on it. I've had some trouble with it cutting out in the middle of maneuvers, so I think I'm too lean, but I'll figure it out.

I just noticed the wing drop issue on Monday when I was beginning to see how it would handle aerobatics. Thanks for the advice. Any more would be greatly appreciated.