Stomp Rocket Replacement Rockets

Over the months, my little one (and her friends) had so much fun with a popular stomp rocket kit that of course we ran out of rockets. Since replacement rockets were tricky to find and were then grossly overpriced, I created this model to replace all those which were accidentally stepped on, were caught by the dog first or just mysteriously vanished.

Key dimensions:

The rocket body fits on a popular stomp rocket launcher with a max. diameter of ~15.4mm and a length of ~175mm. The inner design diameter of 15.85mm leads to an easy slide on while keeping tolerances tight for a very good flight.

Materials:

I found it quite important to use TPU for the nose cone as these rockets come down from quite a height. While I did print a few batches in TPU 85A, dialing that in is quite a challenge and requires some additional mods for some of the Bambu printers. So I switched to Bambu's TPU 95A HF which performs really well if dried and calibrated. In my print profile, I also applied my preferred retract, wipe and slight slow down changes.

For the rocket body, I stuck to PLA for the first batches but am not so much concerned about PETG. Of course, as long as the PETG is dried and calibrated as well.

As for color choice, I went for colors that would help find the rockets in the greenery…

Assembly:

I used superglue, specifically the “Kraftprotz” 3D print superglue gel.