3D printing of jet engines made of metal is what we love about metal 3D printers. Turbojet engines are a combination of high technology, modern heat-resistant materials, and extreme loads. This engine was printed on an AM3D Pro 3D metal printer commissioned by Microjet. According to the NDA, we can't show what is inside because the parameters of the combustion chamber and engine layout are a commercial secret, but we can tell you about it.

Inside the body of the jet engine, there is a heat chamber. Remember that the engine is printed from a powder that resembles the heat-resistant alloy Inconel 718 with a melting point of 1260-1335°C and operating temperature of up to 700°C. The engine walls, which are 0.8 mm thick, have channels for oil and fuel. Separate channels are provided for front and rear bearing lubricants and a separate fuel channel for the spark plug. The technology of layer-by-layer selective laser melting allowed to obtain channels with a diameter of 0.6 mm with a length of 200 mm passing through the entire engine, both vertically and horizontally. At the engine outlet, there is a straightening device to increase the efficiency of the turbine and the overall efficiency of the engine. Thanks to fine-tuning of the 3D metal printing process, the AM3D Pro 3D printer can build blades with an angle of up to 30 degrees without using support structures. Eliminating support structures when printing a straightening device increases the efficiency of the engine by 4-6%.