I'm designing a new profile funfly similar to a Morris Sledge. I have a question about the horizontal offset between the wing and horizontal stabilizer (and the thrust line). I know from experience that it seems that the closer the two flying surfaces are to being in line with each other the less pitch coupling there seems to be, the less down elevator is needed to hold level inverted, etc. Question is can this go too far. Is there any disadvantage in having the horizontal directly behind the wing (on the same horizontal line). This plane has what I would describe as a medium length tail moment(average). If they are lined up will the tail be flying in "dirty" air. If they are to be offset slightly which direction, up or down. And how does all this relate in terms of the thrust line as well.

Thanks in advance

Divit

For a funfly, having the horizontal directly behind the wing is almost mandatory with a tube fuselage.
That's where it is on my StickIt and Ricochet, Femto...
The very good flying "Hots" series also places the horizontal in line with the wing.
Above or below the wing is OK for looks mostly.
For a plane which isn't going in any one direction for any length of time, I doubt it really matters.

Exactly what I needed to hear!

Thanks a ton

Divit