Why fan has three blades

Create New Account? Or Sign In With. Sign in with Facebook. Sign in with Google. Create New Account. First Name. Last Name. Sign Up for Newsletter. Confirm Password. Create an Account. Forgot Password. Please enter your email address below to receive a password reset link. Go back. Comment has been added. Share this post, Hit on social buttons! X Hello World! Plot No. Sign Up for Our Newsletter:. Whether you choose 3, 4 or 5 blades, you can rest assured that your ceiling fan will perform well in your home.

While blades might not be the first thing you think about when buying a fan, they do impact both the aesthetics and performance of the fan. Further, every space also has different cool needs. Some require large-scale solutions, while others need a single fan.

As a result, it is important to consider the type of blades when choosing a fan. We are going to look at the difference between 3, 4 and 5 blade ceiling fans. When a fan has fewer blades, there is generally less dragon on the motor. This means it can go faster and more air more efficiently. As a result, there is more airflow and a better wind chill effect.

This makes your face feel cooler. Finally, the specific shape of the blades ensures that air is being picked up and moved around your home. A fan with fewer blades usually turns faster with a stronger motor. This creates a greater wind chill effect. If you are looking for a gentle breeze, you might need a fan with more blades.

Why do most fans have only three blades? Any idea?? Is there any aerodynamic law that supports the efficiency of using only three blades in electric fans? Are you thinking of any kinda complicated theorems in fluid mechanics? Are you trying to solve this query using Bernoulli's principle? All I can say is that it's a vain attempt! Actually an electric fan can have any number of blades depending upon certain factors.

But, why is it so that most fans have only three blades? Let's see here. Firstly, the main purpose of an electric fan is to create air-flow. So, a good fan must create a good air-flow with minimal noise. Usually an electric fan has a shaft which is rotated at a moderate speed by an electric motor.

The speed of electric fans is chosen in a moderate level for safety purpose and to reduce the noise produced when a fan is operated. There are blades attached to this shaft which rotate along with the shaft. The number of blades and their shape may vary depending upon the model and aesthetic sense. Even there are certain fans with only one blade. These are usually meant for aeroplane propellers.

Fans may have any number of blades placed at any position. But the weight of the blades must be balanced so that there is maximum efficiency. For that reason, fans with only one blade is not often preferred, as the weight of the blade tend to bend the blade down.

Coming to the arrangement of fans with two blades, it is obvious that these two blades must be oppositely arranged to each other. Similarly in the case of having three blades, each of them must make an angle of degrees with the next blade.

Now coming to the structure of the blades, each blade is moderately long, thin and bent a little up. But, nowadays, there are plastic polymeric blades having a comparable strength to metal blades, are used.

Each blade is inclined a bit so that it forces air ahead of it forward. When an electric fan is switched on, the rotation of the blades increases the velocity of the air along the blades in circular direction Generally hot air rises upwards. This hot less dense air comes to contact with the whirl rotation of the blades and are forced back with a little higher pressure.