Hello, welcome back! By reading the title of the blog you will get to know what the topic is about. yes, you have observed most of ceiling fan having 3 blades, but there is 4 and 5 bladed fans also available in the market that you cannot find more in India.
We will see the technical reason behind why these ceiling fans have 3 blades. Normally the number of blades is indirectly proportional to air delivery, that means if less number of blades more the air delivery. If there are more than 3 blades for a fan then the drag on fan increases which lead to rotate slow. So less bladed fan is more efficient on air delivery wise. According that least number of blades for a fan is 2. yes two bladed fan is also available but usage is less. if you want to see the two bladed fan then have a look.
I think most of you are looking for the first time that fan with two blades. Whatever, As a says if air delivery is high for less blade numbered fan then why we are not finding two blade fans much in market??
Even this question has raised in your mind. yes, its time to know the technical reason for that too. Another principle of fan is number of blades is also indirectly proportional to the noise generated by fan. That means if blades number is less the noise is more so two bladed fans are not much used anywhere.
To balance both the condition like air efficiency and less noise the fan has designed with 3 blade. You can see 4 or 5 bladed fan in U.S, U. K .,, but in India most of them are 3.
I heard something interesting while reading about this concept, let me share that think with you also in this blog. It is nothing but In foreign countries the fans are made like giving cold air in summer and by reverse switching that takes away the cold air from the room to maintain hot temperature in winters. Very interesting right? yes, it is very interesting technology to hear and also excited to experience.
And one more thing not only the number of blade decides the air quantity but also the shape of the blade and the adjustment, curving angle of the blades everything matters.
There is a lot of logic behind the simple fan. we never thought of all this things when just switching on the fan because it is the simple task that ever to do know……
~~Thank you~~
