Shop Fan Unit

 A ducted fan is a propulsion arrangement whereby a mechanical fan, which is a type of propeller, is mounted within a cylindrical shroud or duct. The duct reduces losses in thrust from the tips of the props, and varying the cross-section of the duct allows the designer to advantageously affect the velocity and pressure of the airflow according to Bernoulli's Principle. Ducted fan propulsion is used in aircraft, airships, airboats, hovercraft and fan packs.

Ducted fans normally have more and shorter blades than propellers and thus can operate at higher rotational speeds.

Among model aircraft hobbyists, the ducted fan is popular with builders of high-performance radio controlled model aircraft. Internal-combustion glow engines combined with ducted-fan units were the first achievable means of modeling a scaled-size jet aircraft. Despite the introduction of model-scale turbojet engines, electric-powered ducted fans remain popular on smaller, lower-cost model aircraft. Some electric-powered ducted fan airplanes can reach speeds of more than 320kmh (200mph). -Wikipedia

     
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    EPF Hobbies  Mercury 64mm 3700KV-CCW 3-4S Li-Po EPF Hobbies  Mercury 64mm 4700KV-CCW 3-4S Li-Po EPF Hobbies  Mercury 74mm 2200KV-CCW 6S Li-Po
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    HET 90mm 9305-700 EDF Fan Unit HET 90mm Rotor with Collet HET Typhoon EDF 1W-30 with 6904 Fan Unit
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