A team of experts from a leading technical university in the USA, Massachusetts Institute of Technology (MIT), conducted practical tests of a rocket engine printed on a 3D printer. A solid fuel propulsion system could open a new milestone in space exploration. The engine in a plastic casing honorably withstood the pressure of a hot jet. The nozzle, also made of plastic, practically did not melt during the test. The engine’s efficiency has so far been low, the reuse of parts, for which Elon Musk stands, is also not provided. At the same time, the use of 3D printing, firstly, will allow researchers to create small aircraft for their scientific research, and secondly, it can be of interest to NASA. Like other specialized agencies, it is always puzzled by the problem of reducing the cost of space rocket construction projects that are designed to carry out short-term missions. To create the engine, the Markforged Mark 2 3D printer model was used. Its cost is $ 13.5 thousand – this is a feasible amount for almost any grant allocated to research in American universities.