MIT tests rocket with 3D-printed plastic housing

Scientists at MIT have experimented with a rocket engine built from plastic from a 3D printer. In a first test, the ignition appeared to go well, with minimal damage to the plastic housing.

The researchers have written a blog post about their experiences with the plastic rocket motor. A short video shows the result, with the combustion taking place with a fuel that has a lower energy density than conventional rocket fuel. The researchers did this to prevent damage to the plastic housing as much as possible. In the end, it turned out that only a few millimeters of plastic had been damaged around the ‘neck’ of the rocket, making the test a success. A second test, using a fuel with a higher energy density, was less successful, but the researchers developed the rocket motor with a single use in mind.

Although such a rocket engine is far from being immediately usable for space travel, the relatively cheap development enables hobbyists and small companies to build rocket engines themselves. MIT used a Markforged Mark Two-3d printer to build the housing. Although this, with a price of 13,500 dollars, or around 12,400 euros, still requires a substantial investment, it is more affordable than the amounts needed for the development of a conventional rocket engine.

The researchers at MIT are already working on improved models, among other things to make the rocket motor larger and more robust. This should ensure that the whole can ultimately also be used outside the lab.