Quick printing, single-use cone-shaped rocket fin attaches directly to Type C model rocket motor.
This piece is a single-wall print and therefore prints very quickly (30 min).

It fits tightly over the bottom of a Type C model rocket engine (no adhesive or tape required) and has a slot for the launcher rod.

The download includes g-code, stl, and SketchUp files, feel free to edit/remix, but read the instructions for advice on slicing it.

(the Thingiview shows the top and bottom as solid surfaces, this is normal for spiral-type prints)

I'd love to see pics of completed prints or, even better, video of one flying!