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Actually some have more than 3. Three is the minimum to keep things balanced. With 1 or 2 blades, the fan will tend to wobbel depending on geometry and material used. IE there are 1 and 2 foam blades used on hand held sprtitzer devices that tourists carry around. Since the weight is minimal and cost is essential, it works. However for home ceiling fans, its important to have 3-5 blades. Generally the 5 blade fans have longer blades and are used for large rooms that nee more air pushed.
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Is fan operating in ac voltage?
A fans blades are driven by motors. Since there are both AC and DC motors, fans can be AC or DC. The fans in your computer are DC fans. Your ceiling fans are AC fans. (Thanks for fixing my answer)
What was the three major differences between the first generation and the final generation design of the Gossamer Condor?
The final generation Gossamer Condor had swept back wings, the wings undersides were covered with mylar, and there was an enclosed space for the pilot. All of these changes increased the airplane's performance.
What advantages do centrifugal fans have over axial fans?
Centrifugal fans have several advantages over axial fans. They produce more pressure for a given air volume, and do not require an exterior wall like axial fans doo.
In which theory does airplane fly?
The construction of the plane wings is slanty....Because of the speed and slanty wings a vaccum is creating on the top of the wings and the air pressure at the bottem of the wings will push the aeroplane up .................. ( a future aeronautical engneer) jose mathew auckland new zealand
Can you get wings?
mabey... if you want to
