Tail rotates around the nose..

[Joe Yau]

Just wondering what I need to do to reduce the tail rotating around the nose on inside corners?  more flaps, less flaps,  move the LO further back, etc.

Thanks in advance.

[Brett Buck]

Just wondering what I need to do to reduce the tail rotating around the nose on inside corners?  more flaps, less flaps,  move the LO further back, etc.

Thanks in advance.

    Do you mean that airplane appears to rotate around the nose?  More flap WRT the elevator or move the CG forward. I would try the former first, in *tiny* amounts.

    Brett

[Steve Helmick]

Joe...Is this your new plane? I'm not sure I know what you mean by "turning around the nose".

I've seen planes "climb" through the corners, and I've seen them "skid" through the corners, and I'm trying to figure out which problem you are having. I may be wrong, but it seems like it must be one or the other. If it's skidding, the plane is too heavy and/or the flaps don't move enough. I think this may be what you are describing.

Be aware that you'll probably need to adjust your handle, probably both for spacing and neutral after shortening the elevator control horn setting.  Steve

[Joe Yau]

   Do you mean that airplane appears to rotate around the nose?  More flap WRT the elevator or move the CG forward. I would try the former first, in *tiny* amounts.

    Brett

That's exactly what I meant.  I had more flaps before,  but then the plane seems to skid or floats a bit through the inside rounds at times. as why I reduced the flaps, and it seems to tracked better.  I guess I'll try some nose weight next.

Joe...Is this your new plane? I'm not sure I know what you mean by "turning around the nose".

I've seen planes "climb" through the corners, and I've seen them "skid" through the corners, and I'm trying to figure out which problem you are having. I may be wrong, but it seems like it must be one or the other. If it's skidding, the plane is too heavy and/or the flaps don't move enough. I think this may be what you are describing.

Be aware that you'll probably need to adjust your handle, probably both for spacing and neutral after shortening the elevator control horn setting.   Steve

no , It's not my new plane. Just the Saturn..  I've been working on it for a while and got most of the tracking issue sorted out.  then noticing this issue after I removed the 1/32" turbulator rod  I had on the LE of the stab.   (the plane has a blunt flat stab)  even though it improved tracking in the round, the tail wants to rotates more for some reason. (most noticeble in 1st corner of  Triangle & hourglas)   It is of course is manageable, but I just don't think is quite right.  

Edit:
I guess I didn't quite answer your question on either climb or skid through the corner.  It's probably closer to skid, but its a controllable skid.. like drifting the tail out around the nose if I fly it soft. I'm more interested in getting the nose to rotate a bit, so its closer to the CG on the wing.. then at the nose. (similar to  Keith Renacle's similator)

[Brett Buck]

That's exactly what I meant.  I had more flaps before,  but then the plane seems to skid or floats a bit through the inside rounds at times. as why I reduced the flaps, and it seems to tracked better.  I guess I'll try some nose weight next.

    It only takes a *tiny* change in the flap/elevator ratio. You may well have gone from not enough to too much in one step. "Floating" is a decent description of what happens when you have too much.  Its much easier to see the effect in the corners than the rounds, too much is usually "swoopy" like a Nobler.

   In general, I would prefer to adjust it as much as possible with the control ratio, and as little forward CG movement as possible, and err on the side of "rotates around the nose" rather than "rotate around the tail'.  I would suggest putting in more flap travel, until it turns smartly without "swooping",  and if it wants to consistently wind up tighter/come out high on rounds, then add tiny bits of nose weight until it stops.

    Brett

[Joe Yau]

   It only takes a *tiny* change in the flap/elevator ratio. You may well have gone from not enough to too much in one step. "Floating" is a decent description of what happens when you have too much.  Its much easier to see the effect in the corners than the rounds, too much is usually "swoopy" like a Nobler.

   In general, I would prefer to adjust it as much as possible with the control ratio, and as little forward CG movement as possible, and err on the side of "rotates around the nose" rather than "rotate around the tail'.  I would suggest putting in more flap travel, until it turns smartly without "swooping",  and if it wants to consistently wind up tighter/come out high on rounds, then add tiny bits of nose weight until it stops.

    Brett

Thanks for the advices..     I guess you could say it was a bit swoopy, it just felt like the wing had too much lift to be able to fly precise.  The changes made were only 1/32" in on the Elev horn.    I'll try a tiny bit more flaps like 1/64" or so. and will see what happens.   just hope it doesn't upset tracking in other areas.