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Air Balloon Motor for LEGO
A simple 3-cylinder radial engine compatible with LEGO Technic.Toys
Creative Commons Attribution Noncommercial Share Alike
Commercial use is not allowed, you must attribute the creator, you may remix this work and the remixed work should be made available under this license.
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.
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