China has tested a 3D-printed turbojet engine in flight for the first time, a development that could support the country’s growing fleet of high-speed, low-cost and quick-to-produce military drones.
During the 30-minute flight on Sunday, the engine took a small, missile-shaped target drone to an altitude of 6km (3.8 miles) and a top speed of around 925km/h, about three quarters the speed of sound, state broadcaster CCTV reported on Thursday.
It said the engine operated normally throughout the…
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