I've always liked the swing wing concept, and have made a couple functional variable geometry planes, but they've all had the same issue.
Short of making some sort of moving counterweight system is there any way to make a swing wing plane that stays close enough to level flight that I don't have to use trim, once I swing the wings back?
@SVT13 that's one way, but more often a rotator on the horizontal tail surfaces sync'd with the wing sweep control that pitches a little up or down as the wings move. You'll have to adjust and fine tune it to get it to work exactly right.
@ChiChiWerx Like say, canards attached to rotators?
I'm not sure why anyone in SP is averse to using trim as trimming is one of the more realistic aspects of this game. The pitch effects that come from swinging the wings are pretty much what happens in real life for the same reasons they happen in the game. VG aircraft almost always have some sort of automatic pitch trim compensator system. You could try incorporating that into your VG designs to see if that helps...
Simply put, Pushing the Center of lift closer to the back is an inherent function of Variable Geometry Wings. The best thing to do would be to limit the trim as much as you can. Alternatively you can make a trim system independent of the Pitch control surface.
@Jengstromi I don't like it since it reduces pitch responsiveness.
Not that I know of. Why don't you want to use trim?