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US Army Flies VICTOR Hybrid Electric Drone with 3D-Printed Heavy-Fuel Rotary Engine
Key points
- VICTOR drone uses a 3D-printed heavy-fuel rotary engine.
- Engine operates on JP8 military fuel for increased efficiency.
- 3D printing enabled an air-cooled design, removing liquid cooling.
- Engine generates electricity for propeller motors, like hybrid EVs.
Successful Flight of VICTOR Drone
Researchers at the U.S. Army Combat Capabilities Development Command (DEVCOM) Army Research Laboratory (ARL) have successfully conducted a flight test of the VICTOR hybrid electric drone. This drone incorporates a heavy-fuel rotary engine, which was rapidly developed using metal 3D printing technology.
Optimized for JP8 Fuel
The VICTOR drone's engine is designed to run on JP8, a dense kerosene-based military fuel. While JP8 offers advantages in fuel density and aligns with military initiatives for single-fuel sources, its lower volatility and higher flash point present challenges for efficient combustion. The ARL researchers focused on optimizing the engine to overcome these issues, improving fuel atomization and reducing compression leaks.
Impact of 3D Printing and Design
The use of advanced manufacturing, specifically 3D metal printing, allowed for rapid iteration and redesign of engine components. This enabled engineers to create an air-cooled engine, eliminating the need for a bulky liquid cooling system and reducing the overall size of the propulsion system. Computational fluid dynamics (CFD) and a clean-sheet design approach contributed to these innovations.
Hybrid Electric Propulsion System
The heavy-fuel rotary engine in the VICTOR drone does not directly power the propellers. Instead, it drives a 400-volt motor-generator to produce electricity, which then powers the propeller motors. This setup allows the engine to operate at its most efficient RPM independently, similar to some hybrid electric vehicles. The drone is a vertical take-off and landing (VTOL) unmanned aircraft.
✨ This summary was generated by AI from the outlets' reporting listed below. It is not independently verified and may contain errors — check the original sources. How BrevFeed works →
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Reporting from
The U.S. Army Combat Capabilities Development Command (DEVCOM) Army Research Laboratory (ARL) successfully flew the VICTOR hybrid electric drone, which uses a 3D-printed heavy-fuel rotary engine. This engine design allows the drone to operate on JP8 military fuel, improving performance and reducing the need for a liquid cooling system.