US Army successfully flies a hybrid electric drone with 3D-printed heavy-fuel rotary engine — uses advanced engineering to ditch a bulky liquid cooling systemBy NewMaxx / November 4, 2026 Direct: https://www.tomshardware.com/tech-industry/drones/us-army-successfully-flies-a-hybrid-electric-drone-with-3d-printed-heavy-fuel-rotary-engine-400v-motor-generator-uses-advanced-engineering-to-ditch-a-bulky-liquid-cooling-system
