Electric duct fans (EDF) operate with less noise and more efficiency.
EDF planes run with multi-bladed propellers, taking in air and spinning at high speeds:
- EDF stands for Electric Ducted Fan. It's used to power models of jet aeroplanes. They're a relatively recent invention, made possible by improved motor and battery technology.
- KV is the value of unloaded RPM created per volt. If this number is too high, you may burn your power system components up. If the number selected is too low, the ducted fan unit may not produce enough thrust for flight. By reducing propeller blade tip losses, the ducted fan is more efficient in producing thrust than a conventional propeller of similar diameter, especially at low speed and high static thrust level (airships, hovercraft).