I spent the past month making SSTO space planes. I have made designes which get a single kerbal into orbit, onto a space station if desired, and then bring the plane home with remote control. But I have had trouble getting a passenger section up, so I can use one trip to get a handful of kerbals up there at once. I finally worked out a good ratio of jet engines to rocket power on these larger craft, but I find on re-entry the center of gravity on the craft has massively shifted, due to the lack of fuel on the way home. So the center of lift is now way in front of my center of gravity, causing me to flip out of control once I hit the atmosphere. My solution, which has had only limited success, (its still pretty unstable in general, but better) is to have a wing section on the front of the craft detach on re-entry. Sense I don't need that much lift in front of the craft on the way home, I just get rid of it. somewhat wasteful, but I am having a really hard time balancing the center of gravity/lift on a full/empty craft. Any tips on how to keep a craft stable once its way lighter than when it went up? (I'd post images of my plane, but the forum wont allow it?) EDIT: Ah, its because I'm new. I'll post a pic once I get approved to do so