Water-cooling a 3D Printed Rocket Isn’t Quite Practical
Water-cooling a 3D printed rocket has proven to be impractical due to the limitations of consumer-grade materials. Despite attempts to use water cooling to mitigate melting, tests showed that the combustion chamber and nozzle still failed. The need for a large water supply adds significant weight, making this approach unfeasible for flight-ready engines.
- ▪Consumer-grade 3D printers struggle with high-temperature applications.
- ▪Attempts to use water cooling in a 3D printed rocket resulted in melting components.
- ▪A large supply of water would be required to keep the rocket cool, adding weight.
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| Original publisher | Hackaday |
| Canonical URL | https://hackaday.com/2026/05/23/water-cooling-a-3d-printed-rocket-isnt-quite-practical/ |
| Publication time | Sat, 23 May 2026 11:00:45 +0000 |
| Retrieval time | 2026-05-23T11:02:26.394Z |
| Last seen | 2026-05-23T11:02:26.394Z |
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Opening excerpt (first ~120 words) tap to expand
Water-cooling A 3D Printed Rocket Isn’t Quite Practical No comments by: Zoe Skyforest May 23, 2026 Title: Copy Short Link: Copy Consumer-grade 3D printers are useful for lots of things, but they kind of fall down when it comes to making stuff that survives high temperatures. [Mr. More Gooder] wasn’t deterred from a rocket build using FDM printed parts though, instead relying on water cooling to try and beat this practical limit. The concept is simple enough—[Mr. More Gooder] printed a propane-burning combustion chamber and nozzle out of plastic that you’d totally expect to melt when the flames started. Thus, the nozzle was given fittings to allow water to be continually pumped through to try and drag away enough heat to let the rocket survive more than a few seconds.
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