February 21, 2013 AT 6:00 am

Balloon Powered Jet Car With Printable Wheels #3dthursday

Balloon Powered Jet Car With Sweet Rimzzz by thehans from The Makers Workbench:

While visitng from Germany, my nephew wanted me to print something for him to play with using my Lulzbot AO-100 3D printer. Naturally I went straight to Thingiverse and found a cool Balloon Powered Jet Car that I could print up in about two hours with everything on a single plate. The video below is a timelapse of the print which was sped up about 1500%. 

I sliced the model at a .40 layer height, 25% infill, and speeds were around 70mm/sec on Peremiters, Small Peremiters, and  Infill. With such a thick print, I decided to squish the first layer a little more than normal. I chose 70% over the usual 90%. This turned out to be an issue with the wheels as it made one side of the wheels a little wider than the other 99%. A quick sanding took care of this though.

I used finishing nails to mount the wheels and used a drill bit to clean up the car axel holes, then a slightly larger drill bit to open up the wheel axel holes a little. Unfortunately the balloons I had on hand were just not powerful enough to push the car across the floor. Still, my nephew had a blast watching the car form infront of his eyes. I honestly think that he sat and watch the entire print. 

Read more.


Check out all the Circuit Playground Episodes! Our new kid’s show and subscribe!

Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground”Adafruit’s Apps!

Maker Business — Profile on iFixit (repair/takedowns and more)

Wearables — This one’s for all the Cosplayers out there

Electronics — Capacitor ESR

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !

1 Comment

  1. One reason why the balloon power is insufficient is the exaust is effectivly a straight pipe — which means the speed (or lack thereof) of the car scales directly with the pressure in the balloon. Changing the exaust pipe to a De Laval nozzle (https://en.wikipedia.org/wiki/De_Laval_nozzle) would help a little (such nozzles work best with heated and pressurized streams of gas; but pressurized ambient temperature streams of gas still see some benefit).

Sorry, the comment form is closed at this time.