Balloon Powered Jet Car with Sweet Rimzzz

by thehans, published

Balloon Powered Jet Car with Sweet Rimzzz by thehans Feb 4, 2012

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Since I didn't happen to have any toy wheels just laying around, I designed some to be printed.

Changes from original:
-Added sweet rimzzz
-Exhaust port changed to round hole, increased size to 7mm diameter.
-Wheel mount holes changed to fit small finishing nails
-Added lip to balloon stem


Extra Hardware needed:
4 Small finishing nails (3d 1-1/4")
4 m3 washer or similar tiny size

  1. Print car and wheels. Use low infill for MAXIMUM POWER-TO-WEIGHT RATIO!
  2. Test fit each wheel on a nail to make sure they spin freely. I had to use a fine round needle file to clean the holes a bit.
  3. Put small m3 washer on nail/axle between wheels and car body. This might not be necessary, but I had some washers and thought it was a good idea.
  4. Tap nails into guide holes.
  5. Put a balloon on and have a blast!

I've only printed one of these so far and the nail holes were originally way too small. It was bending the nails trying to hammer them in! I had to drill out the holes a tiny bit for a good fit. I changed the script to make slightly larger holes, so hopefully this will work for other people without the need to drill.

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How do you add the whell ? that to small...

How does it work?

I always used punching bag balloons for these things, try it!

I was thinking of making one where the axle is driven by the balloon air, should make for some massive power.. wonder if the wheels would even have enough grip..

Awesome design though!

I think I built my body with too high an infill. 30% makes the body just too heavy. Going to have to try again.

Otherwise the design looks pretty neat.

The plate printed quite nicely, and the rimz are nice and sturdy! I'll probably do the next set as separate pieces though, my ultimaker stringed a lot going to and from the wheels and it took a fair bit of sanding to make them round again...

Oh and i recommend drilling the wheel hub before assembly, to optimize your MPG (meters per gale)

Nice. Those are sweeeeeeeet rimz!

Nice improvements!