Such is the case with this 3D-printed compressed air engine, which just keeps getting better. The design has changed a lot since we first covered [Tom Stanton]’s attempts at reviving the ...

The engine is based around a single piston and runs on compressed air. The reduced parts count is a result of using the propeller axle as a key component in the engine itself. There are flat ...

To achieve this feat, researchers aimed to use the simplest technology available: a desktop 3D-printer and an off-the-shelf ...