follow-up:
I built my Viking something like this one, with three fins attached on the long edge, with LE shorter than TE, since I thought it would be lighter, less air resistance and would go higher, that was some clever engineering for a Cub Scout, right? I did not get the fins on straight and was embarrassed at how crooked one of them was. I just could not get the glue to grab, the fins kept falling off and I had to put them back on, I got sticky glue finger prints all over. But when it came time to launch it, the crooked fins made it spin and wobble, almost like a corkscrew type rocket that made a pulsating tremolo sound as it went up and left behind a helix smoke trail that everyone thought was really cool and asked me: "how did you do that?"
That's my origin story!
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