In-flight base mounting an airplane model ?

Another way to go is to have a stout L shaped bar, the horizontal end stuck into the tail, and the vertical some inches hehind her, down to the base.

Theres been some really nice mounts done where the a/c is about to smack the end of the runway, and the modeler makes the runway ### "smeared" giving a sense of motion.

If you go with the payload bay idea, I second Paul and suggest that you install a piece of tubing from the upper underside of the bay up to the roof. That gives you more glue surface up there, and the aircraft can then be placed down onto a dowel that slips up inside the tube. I do that with my ships.

Oh last thought. Give her some "attitude" front back left right.

Thanks Paul,

I neglected to say that the payload bay door is open and the interior finished, so you would see the tube when looking in, although it would indeed make it twice as strong.  Something to think about, which I hadn't.

I recommend that you make the mounting tube longer and have it extend to the top of the fuselage interior. Cap off the top of the tube to increase the bonding surface. If you're careful, you can place a dab of epoxy on the top of the tube, insert it into the model through the hole in the belly, and press it up against the inside of the fuselage at the top. Epoxy around the tube where it passes through the hole and you've effectively doubled the strength of the mount.