Here is another cool gift idea for engineers in your life. The Swashplate 16 Cylinder Aircraft Engine has a stainless steel and aluminum construction. It runs on butane gas and can reach max speeds of 2000 RPM. This engine is made by Kazuya Model Studio.
More gadgets like this: here
This aircraft engine model has a footprint of 20 x 12.3 x 2cm.
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