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2. Ducted fan - Wikipedia

   en.wikipedia.org/wiki/Ducted_fan

   The high-bypass turbofan engines used on many modern airliners is an example of a very successful and popular use of ducted fan design. The duct increases thrust efficiency by up to 90% in most cases [citation needed], in comparison to a similar-sized propeller in free air. Ducted fans are quieter, and offer good opportunities for thrust vectoring.

3. Airbus E-Fan - Wikipedia

   en.wikipedia.org/wiki/Airbus_E-Fan

   The first flight of the E-Fan 2.0 was originally planned for 2017 and the E-Fan 4.0 for 2019. [1] A ducted fan on the E-Fan. The E-fan is of all-composite construction and is propelled by two ducted, variable-pitch fans spun by two electric motors totaling 60 kW of power. Ducting increases thrust while reducing noise, and having the fans ...

4. Turbofan - Wikipedia

   en.wikipedia.org/wiki/Turbofan

   A turbofan achieves this by using an additional turbine to drive a ducted fan to blow air that bypasses the high speed core. With a lower core thrust, most of the thrust now comes from the large mass of low speed bypass air, providing the same thrust with a reduced fuel burn. The other penalty is that combustion is less efficient at lower speeds.

5. Lilium Jet - Wikipedia

   en.wikipedia.org/wiki/Lilium_Jet

   Its 36 electric ducted fans are powered by a 1 MW (1,300 hp) lithium-ion battery; less than 200 hp (150 kW) is required to cruise. ... Design Concept for “Best of ...

6. ArcaBoard - Wikipedia

   en.wikipedia.org/wiki/ArcaBoard

   ArcaBoard is an electric commercial hoverboard developed by ARCA Space Corporation. It is powered by 36 electric ducted fans, capable of transporting a person weighing up to 110 kg (243 lbs), and has an endurance of up to 6 minutes. It was designed for entertainment and personal recreation purpose.

7. Ryan XV-5 Vertifan - Wikipedia

   en.wikipedia.org/wiki/Ryan_XV-5_Vertifan

   The J85 and lift-fan combination was a precursor to developments which led to the first GE high BPR engine, the TF-39. [4] The lift fans were driven by turbine blades mounted around the periphery of the fan, with mass flow 13 times greater than the gas generators mass flow and increased thrust 3 times over that available using a propelling nozzle.