Interesting Engineering on MSN
China tests first 3D-printed mini turbojet engine hitting Mach 0.75 at 20,000 feet
China's state-owned AECC has used advanced 3D printing technology to manufacture the miniature turbojet engine.
The AltoVolo Sigma hybrid-electric aircraft flies 500 miles at 220 mph while operating 80% quieter than helicopters, featuring safety systems and compact design.
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