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Opennautics is a community of enthusiasts dedicated to open source space exploration.

Open Source Products

Opennautics is developing open source space exploration hardware, such as rocketry and astronomy products. Collaboration of product development and documentation can be accomplished in the cloud with GitHub and by building up the wiki. View the calendar to see upcoming events and project milestones.


The success of Opennautics and open source space hardware depends on the community. Submit ideas and discuss new innovations. Add images and give your thoughts in the forum. Take a look at the user contributed showcase to see photos and altitudes that members have achieved.

Start Exploring

Join the Opennautics community by creating a new account. As an open source hardware advocate, Opennautics encourages anyone to freely download design documentation (CAD), view bill of materials (BOM) and improve upon the existing products. Tutorials are available for beginners. View the frequently asked questions, and learn how to help Opennautics grow.

Open Source Hardware

"Open Source Hardware (OSHW) is a term for tangible artifacts -- machines, devices, or other physical things -- whose design has been released to the public in such a way that anyone can make, modify, distribute, and use those things." Opennautics has chosen to use the CERN Open Hardware License for all products.



Making mistakes, again and again

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Last Tuesday at the Electrolab I set out to assemble together a large part of our test engine, including a concrete nozzle made out of fireplace sealant that Ryan had shipped to me by post from Finland.

How to mold a paraffin grain

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Following my previous post about preparing a test combustion chamber and preparing the paraffin grain molding, last Thursday I actually molded the grain.

The joy of learning machining and building rocket parts in a hackerspace

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How do you transform a 6x50x1cm rectangular aluminium bar into a round piece of metal with a 2mm high and 5mm wide shoulder and an inner hole 21mm wide? That's when machining comes into play. And that's when being a member of one of the largest hackerspaces in Europe gets even more amazing.

Another failure, but one step closer

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The latest nozzle manufacturing test utilizing material designed to be used as a fireplace sealant has failed. However, there are signs that this method can be successful. Each failure brings lessons learned.

In this case, the material has cured well with the mold design. Preparations for the melting of the mold was done correctly. The melting of the mold was done correctly, unlike the previous attempt.

One Small Mistake Can Ruin Weeks of Preparations

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If you have followed along in the forums, I have been testing the creation of a nozzle with the use of a material that is designed to be used as a fireplace sealant. The material is inexpensive and can withstand temperatures of up to 1500° C. The trick is to fully inject the material into a mold and let cure for an appropriate amount of time.

My first tests resulted in failure, as the mold did not have enough surface area open to the atmosphere to cure. The material had not solidified and collapsed under its own weight.


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