Air Balloon Motor for LEGO

A simple 3-cylinder radial engine compatible with LEGO Technic.

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Description

Demo and assembly guide:

Exploded view in 3d viewer: https://skfb.ly/6QL8R

Extra parts needed:
- Nitrile glove
- Air balloon

Takes 4m of filament to print (about 5h at 20mm/s on my snail of a printer).
Will print a bit prettier with supports (80deg. overhang, touching buildplate) and ironing.
Parts with names starting with "X_" are optional.

You can insert one balloon into another to get thicker walls. Meant for 2-walled balloon. Idles well with one (with a flywheel), but will hardly pull any vehicle.
You can use metal M5 washer instead of printed one
Found that PLA isn't the best material for the design: isn't very slippery, and "fluid" (the clips stop pushing the parts together with time)

Materials and methods

Printed well in PLA and PETG with 0.6 nozzle at 0.2 layer height.

Issues

Issues are used to track todos, bugs or requests. To get started, you could create an issue.

Comments

Boxi added this to the Lustig collection 2 months ago

Alexander added this to the Kids collection over 1 year ago

Dennis Blankenburg added this to the Dennis collection almost 2 years ago

Sampey added this to the PUPAZZI E GIOCHI collection over 2 years ago

Mario Beaulieu added this to the todo collection over 2 years ago

Telliria added this to the Takeo collection almost 3 years ago

XYZWorkshop commented almost 3 years ago

HOLY COW!! I'm blown away!! This is an awesome design! Thank you for sharing

DLOW added this to the Lego collection almost 3 years ago

Erik de Bruijn added this to the Things to print collection almost 3 years ago

Erik de Bruijn added this to the Cool projects collection almost 3 years ago

Slava published this design almost 3 years ago