Another friend launched a small flying wing a few times with an Estes rocket motor and would glide down. I'm not sure if it ended up in flames or just a bad launchNice! Now that I noticed your avatar, it all makes sense
That video of the biplane would be great to see. Glad he was able to bring it down safely.
One thing I have always wanted to do is fire a small Estes rocket from a plane like a missle. I am sure it would be dangerous, some how, but still...