propeller fan

Here propeller fan including section , plan , rubber seal , plastic anchor , grille frame , discharge grille , guard ,fan motor , wooden frame , cleanable filter The propeller fan is a comparatively simple form of a fan with a sheet metal, 3–6 bladed impeller directly driven by a motor mounted in the air-stream. Efficiencies up to 75% can be achieved, though pressure development is low and overloading can occur if the fan is installed in a system with too high a resistance. Propeller fans are most commonly used for dilution ventilation or cooling. These fans are often mounted in a wall or ceiling. Common examples are your automobile radiator fan or a free standing room fan. An airplane?s engines often run faster than its propellers. For example, on one airplane, the most efficient engine speed is 3,000 RPM, while the most efficient propeller speed is about 1,500 RPM. for more details of propeller fan download this file.